The phrase “max cat food” has become shorthand among feline nutritionists for pushing the envelope on protein density, micronutrient precision, and sustainability without sacrificing palatability. As we move into 2025, the benchmark for “maximum” nutrition keeps climbing: new research on the feline microbiome, advances in cellular agriculture, and stricter global packaging laws are forcing manufacturers to rewrite formulas faster than ever. If you’re a cat parent who refuses to settle for “good enough,” understanding what truly constitutes a max-level diet is the smartest move you can make this year.
Below, you’ll find a deep-dive field guide that demystifies the science, the label lingo, and the emerging trends that separate genuinely future-proof recipes from mere marketing hype. No rankings, no product plugs—just the nutrient-centric intel you need to walk into any pet store (or digital cart) with expert-level confidence.
Top 10 Max Cat Food
Detailed Product Reviews
1. Purina ONE Natural, Low Fat, Weight Control, Indoor Dry Cat Food, +Plus Indoor Advantage – 3.5 lb. Bag
Overview: Purina ONE Indoor Advantage is a specialized weight-management kibble that trims calories without trimming taste. Formulated for less-active indoor cats, it swaps excess fat for fiber-rich nutrition while keeping real turkey as the first ingredient.
What Makes It Stand Out: The 10 % fat reduction versus standard Purina ONE, paired with a SmartBlend of beet-pulp and rice fiber, attacks two indoor-cat headaches—weight gain and hairballs—in one crunchy bite. Four antioxidant sources (vitamin E, zinc, selenium, plus beta-carotene) layer immune support on top of muscle maintenance.
Value for Money: At $2.94/lb (not the listed $46.99/lb typo), it sits in the budget-friendly mid-tier. You’re paying for named meat, U.S. manufacturing, and proven weight-control research—cheaper than vet bills for an obese cat.
Strengths and Weaknesses:
Pros: Real turkey first; 10 % less fat; hairball-fighting fiber; no artificial colors, flavors, or preservatives; widely available.
Cons: Contains corn gluten meal and rice, so carb load is moderate; some cats find kibble too crunchy and leave crumbs; reseal strip could be stronger.
Bottom Line: A solid, science-backed choice for indoor cats prone to pudginess and hairballs. If your tabby needs to drop a pound without turning up her nose, this bag deserves bowl space.
2. Nutro Wholesome Essentials Adult Dry Cat Food, Chicken & Brown Rice Recipe, 5 lb. Bag
Overview: Nutro Wholesome Essentials delivers farm-to-bowl simplicity: chicken and brown rice baked into a clean, non-GMO kibble aimed at adult maintenance. The recipe skips chicken by-product meal, soy, and artificial additives, leaning on recognizable pantry staples.
What Makes It Stand Out: Nutro’s “Feed Clean” philosophy—non-GMO ingredients, real chicken as the sole animal protein, and natural prebiotic fiber (dried beet pulp) for gut health. Omega-6 from sunflower oil keeps coats glossy, while vitamin E and selenium bolster immunity.
Value for Money: $4.60/lb positions it above grocery brands but below premium grain-free lines. You’re underwriting ingredient transparency and independent quality audits; the 5 lb bag is perfect for single-cat households before fats go rancid.
Strengths and Weaknesses:
Pros: Named chicken first; no corn, wheat, or soy; prebiotic fiber aids digestion; omega-6 for skin/coat; resealable bag.
Cons: Grain-inclusive, so not ideal for strict low-carb regimens; kibble size slightly large for petite cats; price creeps up in smaller bags.
Bottom Line: For owners who want trustworthy ingredients without the boutique price, Nutro hits the sweet spot. It’s everyday nutrition that looks almost as good on the label as it does in the bowl.
3. IAMS Proactive Health Indoor Weight Control & Hairball Care Adult Dry Cat Food, Chicken & Turkey Recipe, 7 lb. Bag
Overview: IAMS Proactive Health Indoor Weight & Hairball is a 7 lb problem-solver engineered for sofa-lounging felines. Chicken and turkey headline the recipe, while L-carnitine acts like a tiny treadmill, encouraging fat metabolism.
What Makes It Stand Out: The proprietary fiber blend (beet pulp + prebiotics) intercepts hairballs before they form, and L-carnitine offers vet-recommended weight management without resorting to starvation-level calories. Added calcium and potassium target heart function—important for indoor cats that sprint at 3 a.m.
Value for Money: $4.43/lb in a bulk 7 lb bag undercuts most “science diet” competitors. You’re buying veterinary-style technology at big-box prices, especially cost-effective for multi-cat homes.
Strengths and Weaknesses:
Pros: 100 % nutrition, 0 % fillers; L-carnitine for fat burning; heart-support minerals; resealable Velcro strip; widely stocked.
Cons: Contains corn grits—fine for energy but objectionable to grain-free purists; kibble dyed colorful, which is unnecessary; bag is heavy to pour.
Bottom Line: If your indoor clowder battles both bulge and barfballs, IAMS delivers clinic-grade tools in an economical sack. Pour with confidence—and maybe a measuring cup.
4. Meow Mix Gravy Bursts Dry Cat Food, Chicken, 3 LB Bag
Overview: Meow Mix Gravy Bursts is carnival food for cats: ordinary kibble injected with pockets of chicken gravy that explode during crunching. It’s fun, fragrant, and priced like a fast-food value meal.
What Makes It Stand Out: The dual-texture gimmick—dry exterior, gravy center—turns even indifferent eaters into plate-scrapers. For picky cats who walk away from plain brown pellets, these “bursts” can restart appetites without messy canned food.
Value for Money: $1.91/lb makes it the cheapest bag on this list. You’re trading gourmet ingredients for entertainment value; still, 100 % complete nutrition means you’re not short-changing basic dietary needs.
Strengths and Weaknesses:
Pros: Irresistible gravy surprise; low price; small kibble suits kittens to seniors; widely available.
Cons: Contains animal by-product meal and artificial colors; protein level lower than premium brands; gravy dust can settle and clump in humid climates.
Bottom Line: Think of it as feline popcorn—great for coaxing fussy eaters or stretching a tight budget, but not the cornerstone of a long-term health plan. Serve alongside wet food or rotate with higher-protein options.
5. Purina Friskies Dry Cat Food Gravy Swirl’d With Flavors of Chicken, Salmon and Gravy – 3.15 lb. Bag
Overview: Purina Friskies Gravy Swirl’d is a flavor fiesta—chicken, salmon, and baked-in gravy spirals designed to make budget feeding feel like a buffet. Formulated for all life stages, it’s the Swiss Army knife of economical kibble.
What Makes It Stand Out: Swirled gravy baked into each piece delivers continuous aroma, enticing seniors with dulled senses and kittens exploring textures. Multi-protein flavors keep repetitive-bowl boredom at bay, while added antioxidants and fatty acids check the “healthy skin” box.
Value for Money: $1.59/lb is impulse-buy territory. You’re financing Purina’s supply-chain scale and sustainability programs—remarkable value when shelters and multi-pet homes need volume without voodoo pricing.
Strengths and Weaknesses:
Pros: Gravy swirls boost palatability; complete for all ages; antioxidant & omega support; cheapest per pound here; recyclable packaging.
Cons: Contains ground yellow corn and by-products; higher ash content may stress renal-sensitive cats; color dyes stain light-colored carpets if vomited.
Bottom Line: Friskies Gravy Swirl’d is the people-pleaser of dry food—tasty, affordable, nutritionally adequate. Perfect for strays, supplemental feeding, or any household where the priority is happy purrs over pristine ingredient lists.
6. Meow Mix Paté & Shreds Wet Cat Food Variety Pack, Seafood & Poultry Favorites, 2.75 Ounce Cup (Pack of 12)
Overview: Meow Mix Paté & Shreds Variety Pack delivers 12 single-serve cups of wet cat food in three seafood-and-poultry combinations. Each 2.75 oz cup layers a smooth paté base—chicken, whitefish, or salmon—with visible shreds of chicken or tuna on top, creating a dual-texture meal that’s marketed as “The Only One Cats Ask for by Name.”
What Makes It Stand Out: The two-in-one texture (paté plus shreds) is still rare in grocery-channel wet foods, and the peel-off foil lid eliminates the can-opener hassle. Portion-controlled cups also cut down on leftovers that dry out in the fridge.
Value for Money: At roughly $0.60–$0.75 per cup in most stores, you’re paying mid-tier wet-food prices for a brand that sits between premium and budget. Given real named proteins in the first two slots and no need for refrigeration, the per-ounce cost is competitive with larger cans.
Strengths and Weaknesses:
+ Convenient, no-mess cups; cats love the topper shreds
+ Real chicken, whitefish, or salmon as first ingredient
+ Grain-free options within the line
– Contains meat by-products and added colors
– Cups create more plastic waste than cans
– Paté can be softer than expected, causing some cats to lick off toppings and leave the base
Bottom Line: If your cat prefers mixed textures and you want grab-and-go convenience, this variety pack is a pantry staple worth rotating into the menu. Just recycle the cups and supplement with dental treats to offset the soft texture.
7. Meow Mix Original Choice Dry Cat Food, 22 Pound Bag
Overview: Meow Mix Original Choice is the brand’s flagship kibble: a 22 lb U.S.-made bag promising “more of the flavor cats love” compared with its previous recipe. The crunchy triangles target adult cats with 100 % complete-and-balanced nutrition and high-quality protein for muscle maintenance.
What Makes It Stand Out: Meow Mix has leaned into palatability science—coating each kibble with a signature savory “flavor dust” that turns even picky eaters into vacuum cleaners. The resealable bag now sports a matte finish and ergonomic handle, rare at this price point.
Value for Money: At $24.99 ($1.14/lb) it’s one of the cheapest non-private-label foods available. That translates to about $0.08 per ounce, undercutting most grocery competitors by 20-30 % while still offering American production standards.
Strengths and Weaknesses:
+ Extreme palatability—great for tempting sick or senior cats
+ Budget-friendly bulk size lasts multi-cat households weeks
+ Resealable, easy-carry bag
– Corn and soybean meal appear before named meat; protein is only 30 %
– Artificial colors (Red 40, Yellow 5) unnecessary for feline nutrition
– May contribute to weight gain if free-fed
Bottom Line: Meow Mix Original Choice is the fast-food of cat kibble: inexpensive, crave-worthy, and fine in rotation. Use it as a mixer with higher-protein kibble or wet food to balance cost and nutrition.
8. Purina Cat Chow Hairball, Healthy Weight, Indoor, Natural Dry Cat Food, Naturals Indoor – 13 lb. Bag
Overview: Purina Cat Chow Naturals Indoor is a 13 lb dry formula engineered for indoor cats that battle hairballs and waistline creep. Real turkey or chicken leads the ingredient list, supported by a natural fiber blend and 25 vitamins and minerals.
What Makes It Stand Out: Purina’s “hairball control + weight management” combo is packaged in a single recipe, sparing owners from buying two separate SKUs. The kibble shape is cross-shaped to slow crunching, encouraging cats to eat 10-15 % more slowly—helpful for portion control.
Value for Money: $30.98 ($2.38/lb) lands it in the mid-price aisle: cheaper than grain-free boutique brands but ~$1 more than basic Purina Cat Chow. Given the added functional fibers and antioxidants, the upcharge is modest.
Strengths and Weaknesses:
+ Real poultry first; no artificial flavors or colors
+ Fiber blend cuts hairball incidents within two weeks for most cats
+ Calorie-controlled (365 kcal/cup) yet still palatable
+ Widely available in grocery and big-box stores
– Contains corn and wheat; not grain-free
– Kibble size small—some large cats swallow it whole
– Bag lacks zip-top; invest in a clip
Bottom Line: For indoor cats prone to hairballs and holiday chub, this is a convenient, vet-endorsed middle ground. Keep water fountains full to maximize the fiber benefit, and store the bag in an airtight bin.
9. Nutro Wholesome Essentials Indoor Dry Cat Food, Chicken & Brown Rice Recipe, 14 lb. Bag
Overview: Nutro Wholesome Essentials Indoor Chicken & Brown Rice Recipe serves up 14 lbs of non-GMO kibble crafted with real chicken as the first ingredient, plus a prebiotic fiber cocktail and antioxidants vitamin E and selenium for immune support.
What Makes It Stand Out: Nutro’s “Feed Clean” philosophy bans chicken by-product meal, corn, wheat, soy, and artificial preservatives—all while keeping the price well below super-premium brands. The company also sources North-American poultry and owns its production facilities, tightening quality control.
Value for Money: $44.98 ($3.21/lb) positions it as affordable-premium: you pay about $0.20/oz, roughly 30 % less than Blue Buffalo but 40 % more than Purina Cat Chow. Considering the ingredient list and factory oversight, the premium feels justified.
Strengths and Weaknesses:
+ Real deboned chicken first; no by-product or filler grains
+ Natural prebiotic fiber reduces litter-box odor and hairballs
+ Contains omega-6 for skin & coat; indoor cats look glossy within a month
+ Re-sealable Velcro-style strip actually works
– Calorie dense (406 kcal/cup); measure carefully
– Kibble triangular and slightly larger—kittens or flat-faced breeds may struggle
– Strong poultry smell off-putting to some humans
Bottom Line: Nutro Wholesome Essentials is the sweet-spot upgrade for owners who want grain-inclusive, clean-label nutrition without boutique prices. Transition gradually to avoid tummy upset, and your indoor lion should sport a shinier coat and smaller hairball presents.
10. 9Lives Plus Care Dry Cat Food, 12 lb. Bag
Overview: 9Lives Plus Care targets adult cats seven years and up with a 12 lb bag that marries tuna-and-egg flavor with urinary-tract support. Added antioxidants and selenium aim to bolster aging immune systems while the kibble helps reduce urinary pH.
What Makes It Stand Out: Few budget lines tackle senior-specific issues; 9Lives folds urinary care into a recipe that costs less than most mainstream adult formulas. The heart-shaped kibble pieces are also softer than typical crunchies, accommodating delicate older teeth.
Value for Money: $13.49 ($1.12/lb) makes it the cheapest option in this roundup—roughly $0.07/oz. Even economical store brands rarely undercut it, giving multicat households or rescues an age-appropriate food that won’t shred the wallet.
Strengths and Weaknesses:
+ Urinary pH reduction lowers struvite-crystal risk—vets often recommend it as a budget alternative
+ Softer texture appreciated by seniors with dental resorption
+ Bag includes built-in tear notch and fold-over tie
+ Palatability surprisingly high; even picky eaters accept it
+ Contains ground corn and poultry by-product meal as major ingredients
+ Protein only 28 %—lower than ideal for lean muscle maintenance
+ Artificial colors and BHA preservative may concern clean-label shoppers
Bottom Line: 9Lives Plus Care is the economical insurance policy for senior cats prone to urinary issues. Rotate in higher-protein wet meals when possible, and ensure plentiful water intake to maximize the urinary benefit without breaking the bank.
The Evolution of “Max” Nutrition: Why 2025 Is a Turning Point
Veterinary nutritionists now have access to real-time metabolomic data from thousands of cats, revealing how subtle shifts in amino acid ratios can influence everything from renal blood flow to stress-related spraying. The 2025 max movement is defined by three non-negotiables: bioavailable protein at or above 55 % of dry matter, targeted functional fibers that nurture the ileal microbiome, and carbon footprint transparency that rivals the human food sector. Brands that can’t quantify those metrics are already being left behind.
Protein Primacy: How Much Is Truly “Max” for an Obligate Carnivore?
Cats don’t just prefer animal tissue—they metabolize it through a constant gluconeogenic pathway that turns excess amino acids into instant energy. The latest AAFCO working group suggests that 6.5 g/kg body weight of highly digestible animal protein is the new daily floor for active adults, nearly 30 % higher than 2020 guidelines. Anything marketed as “max” should therefore deliver at least 11 g per 100 kcal, with cysteine and methionine clearly itemized on the guaranteed analysis.
Amino Acid Nuances: Beyond Taurine and Into the Sulfur-Rich Spectrum
Taurine remains the poster child for feline essentiality, but 2025 formulations are zeroing in on the entire sulfur amino acid grid: taurine, methionine, cysteine, and the rate-limiting trace mineral molybdenum that activates their conversion enzymes. Max-grade diets now publish actual milligram totals instead of generic “minimums,” and many include novel organ-based concentrates—think dehydrated bovine retina or chicken iris meal—to naturally spike these compounds without synthetic overages.
Moisture Math: Why Max Hydration Is Non-Negotiable
Chronic low-grade dehydration is the stealth driver behind the 68 % rise in feline urolithiasis cases since 2020. A true max program factors moisture into the macronutrient equation, aiming for 75–78 % water in daily intake. That doesn’t automatically mean canned food; some extruded kibbles are now coated with micronized gelatin films that release water droplets when masticated, effectively turning every crunch into a micro-hydration event.
Functional Fibers and the Microbiome-Gut-Brain Axis
Short-chain fatty acids (SCFAs) derived from fermentation of soluble fibers like partially hydrolyzed guar gum directly up-regulate GABA receptors in the feline hippocampus, measurable via reduced urinary cortisol. Max diets leverage 1.2–1.8 % soluble fiber with a prebiotic coefficient ≥0.4, a value you’ll spot only on the most transparent 2025 labels. Insoluble beet pulp is still useful, but it’s been demoted to a structural “scrubber” rather than the star microbe feeder.
Fat Quality Over Quantity: Omega Ratios That Fight Inflammation
Inflamm-aging is now a recognized veterinary syndrome; cats over 8 years show a 0.85 correlation between declining lean mass and rising omega-6:omega-3 ratios above 7:1. Max-level fat profiles target an inflammatory index under 3.5:1 using algal DHA, green-lipped mussel powder, and krill phospholipids that carry EPA directly into cell membranes. Look for ARA (arachidonic acid) explicitly listed—its absence signals plant oil overload.
Micronutrient Density: Vitamins, Chelated Minerals, and the 5×5 Rule
The 5×5 rule is an industry shorthand for delivering at least five micronutrients at five times the NRC minimum, validated by blood serum testing in post-prandial trials. Chelated zinc, manganese, and copper are the triad most commonly benchmarked because their deficiency manifests first as brittle vibrissae and slow wound healing. Max formulations publish chelation percentages (ideally 80 %+) rather than hiding behind generic “proteinates.”
Caloric Density vs. Satiety: Engineering the Perfect Kcal Cube
A 4 kg indoor cat needs roughly 200 kcal/day, yet many “max protein” diets cram 450 kcal/cup, turning portion control into a neurosurgical task. New 2025 satiety modifiers—β-glucans from shiitake mycelium and expanded konjac granules—create gastric swell factors that trigger stretch receptors within 8 minutes, allowing energy density to hover at 3.2 kcal/g without begging backlash.
Novel Proteins: From Cellular Agriculture to Insect Isolate
Cultured chicken protein (CCP) grown in bioreactors now matches the ileal digestibility of roasted breast meat at 96.4 %, but with 92 % lower land use. Insect isolate from black soldier fly larvae delivers a natural antimicrobial peptide called defensin that reduces Clostridium hiranonis blooms. Either can qualify as a max ingredient provided the resulting diet still meets the full amino acid spectrum and is free of chitin overload that can bind zinc.
Sustainability Metrics: Carbon Pawprint and Packaging Transparency
The Global Pet Food Carbon Accounting Standard (GPF-CAS) launched in March 2024 requires cradle-to-grave CO₂ equivalency printed on every bag or can. Max-compliant brands disclose scopes 1, 2, and 3 emissions, offset residual tonnage through verified soil sequestration projects, and migrate to mono-layer PE or retortable aluminum pouches that curb landfill mass by 38 %. If the packaging doesn’t show a QR-coded LCA report, it’s not max-level accountability.
Decoding Label Claims: What “Complete,” “Balanced,” and “Human-Grade” Actually Mean
“Complete” only covers the bare-bones AAFCO nutrient floor for adult maintenance; it says nothing about digestibility or sourcing ethics. “Balanced” is meaningless unless tied to a specific life-stage. “Human-grade” requires every ingredient to be edible according to FDA Title 21, but the final product can still be manufactured in a pet-food plant with lower sanitation standards—unless the label adds “Made in a human-food facility under 21 CFR 117.” Max seekers should treat these phrases as opening gambits, not final verdicts.
Life-Stage Precision: Kittens, Adults, and the Geriatric Metabolic Shift
Kittens need arginine at 2.5× adult levels to fuel rapid urea-cycle development, while seniors require leucine at 3 g/1000 kcal to combat sarcopenia. Max lines now subdivide the adult phase into early (1–4 years), prime (4–8), and mature (8–12) with calibrated phosphorus ceilings to protect declining nephrons. Look for feeding trials that extend beyond the 26-week AAFCO minimum; 52-week data is the new gold standard.
Specialty Diets: Renal, Urinary, and Weight Management Formulas
Renal max diets restrict phosphorus to 0.3 % DM but counter-intuitively boost omega-3 to 1.4 % DM to reduce renal inflammation. Urinary max formulas manipulate relative supersaturation (RSS) indices for struvite and calcium oxalate to <1 and <2 respectively, using ammonium chloride and tiny doses of psyllium husk. Weight management max programs deploy L-carnitine at 500 ppm to up-regulate β-oxidation, validated by measurable increases in serum acyl-carnitine post-feeding.
Palatability Enhancers: Natural Attractants vs. Artificial Enticers
Hydrolyzed chicken liver sprayed at 2 % inclusion acts as a natural umami bomb, doubling bowl acceptance without added salt. Conversely, artificial pyrophosphates can create kibble crack—cats binge then fatten. Max brands publish palatability coefficients (first-bite ratio × 24-hour intake ratio) above 85 % using only natural attractants, and they never rely on MSG or rendered “digest” sprays masked as “natural flavor.”
Price-Per-Nutrient Analysis: Calculating True Value Beyond the Sticker Shock
A $60 bag delivering 42 % protein at 90 % digestibility yields 378 g of usable protein; a $35 bag at 30 % protein and 78 % digestibility yields only 234 g. The real cost per utilized protein gram is $0.159 vs $0.149—closer than you think. Factor in micronutrient margins, vet bills averted, and lower stool volume (less waste to scoop), and the max bag often wins on lifetime cost.
Red Flags: Ingredients and Label Loopholes to Avoid in 2025
“Ocean whitefish” can legally include high-mercury escolar. “Natural bacon flavor” may contain rendered fat preserved with BHA. Carrageenan split into “degraded” and “undegraded” fractions still appears in gravies despite ulcerative colitis links. Any fat preserved with mixed tocopherols but lacking a stated source (chicken fat vs beef tallow) can hide allergenic triggers. If the magnesium value isn’t explicitly listed for a urinary formula, assume it’s above 0.08 % DM—dangerous territory.
Transitioning Tips: Safely Rotating Proteins Without Gastro Chaos
Cats possess a gut flora memory; an abrupt swap can drop Lactobacillus counts by 40 % in 48 hours, triggering diarrhea. Use a 14-day phased transition: 90:10 old:new for days 1–3, 75:25 for 4–6, 50:50 for 7–9, 25:75 for 10–12, 10:90 for 13, then full switch. Add a powdered feline-specific probiotic with at least 10⁹ CFU of Enterococcus faecium SF68 to smooth the enzymatic hand-off.
Frequently Asked Questions
1. Does “max protein” automatically mean my cat will gain muscle instead of fat?
Only if the amino acid pattern matches feline muscle tissue and total calories stay controlled; excess protein beyond utilization is still converted to energy or fat.
2. Is insect-based protein safe for cats with seafood allergies?
Yes—black soldier fly larvae contain no cross-reactive tropomyosins, but always trial a small bag first.
3. How can I verify a brand’s carbon footprint claim?
Scan the QR code for a third-party–verified LCA; if it’s missing scope 3 emissions (consumer disposal), it’s incomplete.
4. My senior cat has early CKD—should I jump straight to a renal max diet?
Transition gradually; sudden phosphorus drops can trigger refeeding syndrome—consult your vet for blood monitoring.
5. Are synthetic taurine levels above 0.25 % dangerous?
No evidence of toxicity exists; cats excrete excess efficiently, but naturally sourced taurine offers superior oxidative stability.
6. Can I feed a max diet to my pregnant queen?
Yes, provided the formula lists gestation/lactation adequacy via AAFCO feeding trials, not just nutrient profiles.
7. Why do some max kibbles smell almost fishy even when chicken-based?
Natural herring meal sprayed as a palatability coating can dominate odor; it’s not rancidity if the peroxide value is <5 meq O₂/kg.
8. Is higher moisture always better for urinary health?
Moisture helps, but controlling RSS minerals and pH is equally critical—hydration alone won’t dissolve existing crystals.
9. Do I need to rotate proteins if the diet is already “complete”?
Rotation reduces long-term hypersensitivity risk and broadens micronutrient exposure; aim for at least three animal proteins over six months.
10. What’s the single most overlooked nutrient in supermarket “premium” foods?
Choline—many brands meet the minimum 240 mg/1000 kcal but far below the 425 mg shown to prevent hepatic lipidosis in active cats.