Quick answer: Choose a complete wet food that publishes an ash maximum at or below 2.0 percent as fed. Weruva Classic Cat Paw Lickin’ Chicken lists 1.2 percent. Then convert that number to a dry-matter basis and check magnesium on the same label.
This page is a label-comparison brief from The Pet Bench research desk. We did not run feeding trials, burn samples in a lab, or rank brands by price.
Weruva Paw Lickin’ Chicken lists a 1.2% ash max, the lowest published as-fed figure among the four foods we compared.
Ash is not dirt in the bowl. It is the mineral leftover after a lab burns a food sample. Calcium, phosphorus, magnesium, sodium, and potassium all sit inside that leftover.
Shoppers type “low ash cat food” because those minerals show up in urine and bone. The can number is a mineral total. It is not a quality score.
What ash means on a cat food label
A lab dries a sample, then burns it. Protein, fat, and carbs burn away. The gray powder that remains is ash.
That powder is minerals, not grit. Cats need them for bone, nerve, and muscle.
The Association of American Feed Control Officials, known as AAFCO, requires four lines on a typical guaranteed analysis. Those lines are protein min, fat min, fiber max, and moisture max. Ash is not one of those four.
AAFCO’s reading-labels guidance says a maker may add extra guarantees. If ash appears, it must be a maximum. It must sit immediately after the moisture line.
That is why two bags can both be legal and only one shows ash. Missing ash means the maker skipped a voluntary line, not that minerals are low.
The U.S. Food and Drug Administration explains why wet and dry numbers cannot be compared raw. The FDA says canned food is typically 75 to 78 percent moisture. Dry food is typically 10 to 12 percent.
The guaranteed analysis is an “as-fed” figure, so water is still in the food. The FDA says you must convert to a dry-matter basis before you compare a can with a bag.
The FDA also cites the AAFCO Cat Food Nutrient Profile for adult maintenance. That profile sets a 26 percent crude-protein minimum on a dry-matter basis. It does not set a maximum for total ash.
So “low ash” is a shopper phrase, not a legal class. None of the four maker pages we compared uses a defined low-ash claim.
Top 7 Low ash cat food
The picks below are the 7 low ash cat foods on sale right now, listed with what each suits best and an honest drawback. Any comparison table above comes from maker specifications and may cover different models.
1. Purina ONE High Protein Urinary Tract Health Dry Cat Food
Best for: Shoppers who want a printed ash max
Purina ONE’s +Plus Urinary Tract Health bag is grocery dry food sold for adult urinary care. Retailer guaranteed-analysis tables print a 6.2% ash maximum and a 0.08% magnesium cap. Owners report it is easy to restock at big-box stores.
Pros: High-protein grocery urinary kibble; Printed ash maximum on labels Cons: Still ordinary dry kibble
2. IAMS Proactive Health Urinary Tract Health Dry Cat Food
Best for: Budget buyers testing urinary kibble
IAMS Proactive Health Urinary Tract Health is chicken-first dry food at the lowest price here. The maker says the adult recipe is meant to lower urine pH. Owners report they buy the cheap bag first, then decide if a larger size is worth it.
Pros: Lowest price on this list; Chicken-first urinary dry food Cons: Entry-price bag, not bulk
3. Hill's Science Diet Adult Urinary & Hairball Control Dry Cat Food
Best for: Indoor adults needing hairball plus urinary
Hill’s Science Diet Adult Urinary & Hairball Control puts urinary minerals and hairball fiber in one dry recipe. The maker page talks magnesium and natural fiber, not a printed ash line. Owners report longhaired indoor cats get one bag instead of two.
Pros: Urinary and hairball combo; Mid-price adult dry food Cons: Ash not the headline spec
4. Dr. Elsey's cleanprotein Chicken Cat Kibble 2 lb. Bag
Best for: High-protein switchers on a small bag
Dr. Elsey’s cleanprotein Chicken kibble is a two-pound dry bag built around high animal protein, not a urinary SKU. The maker’s short guarantee lists 59% protein and skips an ash maximum. Owners report the small bag is the safe way to try the dense kibble.
Pros: Two-pound chicken trial bag; High-protein dry kibble Cons: Steep price per pound
5. Purina Pro Plan Urinary Tract Cat Food
Best for: Households feeding one urinary formula
Purina Pro Plan Urinary Tract is the step-up grocery urinary bag, with a printed 6.2% ash max and a 0.075% magnesium cap. The maker tells owners to feed this formula alone so the pH target is not diluted. Owners report they keep this bag when the cat already likes Pro Plan.
Pros: Specialized urinary dry formula; Printed ash and magnesium caps Cons: Meant to be fed alone
6. Wysong Uretic
Best for: Specialty shoppers wanting boutique urinary kibble
Wysong Uretic is a specialty dry food the maker positions for urinary health, with chicken first and a 42% protein minimum. The official guarantee does not print ash or magnesium. Owners report they order it online more than they find it on a grocery shelf.
Pros: Specialty urinary dry recipe; Chicken-first boutique kibble Cons: Ash omitted from short label
7. I AND LOVE AND YOU Naked Essentials Dry Cat Food
Best for: Grain-free homes skipping urinary formulas
I AND LOVE AND YOU Naked Essentials is grain-free everyday kibble, not a urinary or low-ash formula. The line is sold as simple meat-forward dry food at a mid-low price. Owners report they chose it for the grain-free bag, not for a mineral claim.
Pros: Grain-free everyday dry food; Lower mid-range bag price Cons: Not a urinary formula
Comparison: Low ash cat food at a Glance
Want to browse every option? See the full range of low ash cat food on Amazon →
The PetBench Ash-Publish Rule
Our research team analyzed maker pages, not bowls. We used one rule for what entered this article.
A food is in only if all three gates are true. It is currently sold as a complete cat diet. The maker publishes a numeric ash or crude-ash figure on its own product page.
That as-fed figure must sit at or below 8.0 percent for dry food, or 2.0 percent for wet food. We left out treats, toppers, and snack broths. We left out any brand that does not publish ash on its own page.
We left out bone-heavy air-dried recipes above the 8.0 percent dry-food gate. We allowed adult and all-life-stage foods, not “supplemental only” cans.
Four complete foods that publish an ash figure
The table uses each maker’s listed attributes, with no rank or price column.
| Product | Form | Ash (as listed) | Moisture | Magnesium | Crude protein | Calories as listed |
|---|---|---|---|---|---|---|
| Weruva Classic Cat Paw Lickin’ Chicken | Wet, gravy | 1.2% max | 85% max | 0.018% max | 10% min | 57 kcal per 3 oz |
| Wellness CORE Signature Selects Tuna & Shrimp | Wet, flakes | 2.0% max | 85% max | 0.025% max | 10.0% min | Not listed on page |
| ORIJEN Original Cat | Dry kibble | 8% crude ash | 10% | 0.1% | 40% | 4,160 kcal/kg |
| Annamaet Original Feline | Dry kibble | 7.27% typical as fed | 10% max | 0.17% typical as fed | 33.00% min | 410 kcal/cup |
Weruva Classic Cat Paw Lickin’ Chicken
Weruva’s page lists boneless, skinless chicken breast as the first ingredient. Chicken broth is second. The recipe is a gravy, not a dense pâté.
Cans come in 3 ounce, 5.5 ounce, and 10 ounce sizes. Weruva lists 57 kcal, 105 kcal, and 192 kcal for those three sizes. That is 673 kcal per kilogram.
Ash max is 1.2 percent, with calcium max 0.2 percent and phosphorus max 0.17 percent. Magnesium max is 0.018 percent, taurine min is 0.05 percent, and crude fat min is only 1.4 percent.
Weruva labels the food for adult cats. It is grain-free, gluten-free, and fish-free. Feed 1 ounce per pound of body weight daily, split into two meals.
If you leave a can on the counter, follow safe wet-food timing. Our how long wet cat food can sit out explainer covers the clock after you crack the lid.
Wellness CORE Signature Selects Flaked Skipjack Tuna & Shrimp
Wellness sells this recipe as flakes of skipjack tuna and shrimp in broth. Cans are 2.8 ounce and 5.3 ounce. The line is hand packed and grain-free.
The guaranteed analysis lists crude protein at 10.0 percent minimum and crude fat at 3.0 percent minimum. Moisture is 85.0 percent maximum. Ash is 2.0 percent maximum.
Magnesium is 0.025 percent maximum. Taurine is 0.05 percent minimum. Wellness says the recipe has no by-products, wheat, corn, or soy.
The maker page we read does not list calories for this SKU. As-fed ash here is higher than Weruva’s 1.2 percent. The dry-matter gap is larger than the label gap looks.
ORIJEN Original Cat
ORIJEN’s U.S. page calls this a dry food for all breeds and life stages. It lists about 85 percent quality animal ingredients, with fresh or raw poultry and fish first.
The recipe uses chicken, turkey, herring, chicken giblets, and hake near the top. Bone in that mix raises mineral mass, so kibble can show more ash than a chicken-breast gravy.
ORIJEN lists crude protein at 40 percent, fat at 20 percent, and crude ash at 8 percent. Moisture is 10 percent. Calcium is 1.4 percent, phosphorus is 1.1 percent, and magnesium is 0.1 percent.
Taurine is 0.2 percent. Metabolizable energy is 4,160 kcal per kilogram. The food is crafted in Canada.
A kitten can legally eat an all-life-stage kibble. That is not the same as saying every kitten should. Read whether kittens can eat adult cat food before you swap.
Annamaet Original Feline
Annamaet’s page leads with chicken meal, brown rice, and chicken fat. Rolled oats, millet, and whitefish meal follow. Herring meal is in the mix for palatability.
Bags are 4 pound, 12 pound, and 20 pound. A standard cup holds about 4.0 ounces, or 133 grams. Metabolizable energy is 3,628 kcal per kilogram, or 410 kcal per cup.
The guaranteed analysis lists crude protein at 33.00 percent minimum and crude fat at 15.00 percent minimum. Moisture is 10.00 percent maximum.
Ash appears on Annamaet’s average analysis table, not the short guarantee block. Ash is 7.27 percent as fed and 7.86 percent dry matter. Typical magnesium is 0.17 percent as fed and 0.18 percent dry matter.
Phosphorus is 1.12 percent as fed, calcium is 1.39 percent as fed, and taurine is 0.21 percent as fed. Annamaet states the food meets AAFCO Cat Food Nutrient Profiles for all life stages. Feeding for a 9 to 12 pound cat is listed as one-half to 1 cup.
Why as-fed ash and dry-matter ash tell different stories
Water hides minerals. A wet food with 85 percent moisture is only 15 percent dry matter. A dry food with 10 percent moisture is 90 percent dry matter.
The FDA’s conversion is simple. Subtract moisture from 100. Divide the nutrient by that dry-matter percent, then multiply by 100.
Our research team applied that FDA method to the four published ash figures. The shelf order is not the dry-matter order.
| Product | Ash as listed | Moisture used | Calculated dry-matter ash |
|---|---|---|---|
| Weruva Paw Lickin’ Chicken | 1.2% max | 85% max | 8.0% |
| Wellness CORE Tuna & Shrimp | 2.0% max | 85.0% max | 13.3% |
| ORIJEN Original Cat | 8% crude ash | 10% | 8.9% |
| Annamaet Original Feline | 7.27% typical | 7.45% typical | 7.86% (maker’s dry-matter line) |
Weruva’s 1.2 percent as-fed max becomes about 8.0 percent once water is removed. ORIJEN’s 8 percent as-fed ash becomes about 8.9 percent. Annamaet already publishes 7.86 percent dry-matter ash.
Wellness at 2.0 percent as fed becomes about 13.3 percent dry-matter ash, the highest mineral density in this set. The can still looks “low ash” next to a bag that says 8 percent.
This is the trap in the search query. Wet numbers look tiny because gravy is mostly water. Dry numbers look large because kibble is dry.
Always convert before you call one food lower. Weruva’s 0.018 percent magnesium max becomes about 0.12 percent dry matter. ORIJEN’s 0.1 percent magnesium becomes about 0.11 percent.
Annamaet’s typical magnesium is 0.18 percent dry matter. Wellness at 0.025 percent as fed is about 0.17 percent dry matter.
Who should not chase the lowest ash number
Kittens build bone. All-life-stage foods such as Annamaet Original Feline and ORIJEN Original Cat cover growth and adult maintenance. A spare adult gravy may not match.
Weruva labels Paw Lickin’ Chicken for adult cats. Do not treat an adult can as a default kitten diet.
A household dog should not live on these recipes. Our can dogs eat cat food guide explains the nutrient mismatch.
A diagnosed stone type can flip the target. Clinic diets sit outside our Ash-Publish Rule.
Healthy adult cats still need calcium and phosphorus. AAFCO’s complete-and-balanced idea is about ratios.
How to feed and store a wet low-ash food
Transition slowly. Weruva tells shoppers to mix the new food in over 7 days.
Match calories, not only ounces. A 10 pound cat on Weruva’s 1 ounce per pound rule would eat about one 10 ounce can, listed at 192 kcal.
ORIJEN at 4,160 kcal per kilogram is dense. Annamaet lists 410 kcal in one cup.
Keep water down even when the food is wet. Weruva and Annamaet both say fresh water should stay available. Leftover cans belong in the fridge.
If you mix wet and dry, convert both sides. A 1.2 percent as-fed wet food plus an 8 percent as-fed dry food is not “about 4.6 percent ash.”
FAQ
What is a good ash percentage in cat food?
There is no AAFCO maximum for total ash. Wet foods at or below 2.0 percent as fed, and dry foods at or below 8.0 percent, cleared our gate.
After conversion, three foods clustered near 8 to 9 percent dry-matter ash. Wellness Tuna & Shrimp landed near 13.3 percent.
Is wet food always lower in ash than dry food?
As-fed, yes, because water dilutes the print. On a dry-matter basis, not always. Weruva at 1.2 percent as fed and Annamaet at 7.27 percent typical both land near 8 percent dry matter.
Does low ash mean better urinary health?
Ash is a total, not a stone plan. Magnesium, phosphorus, urine volume, and diet moisture matter more than the ash line alone. The FDA’s moisture typicals show why a wet format can change urine more than a small ash gap.
Why does my bag omit ash?
AAFCO does not require an ash guarantee. Makers must list protein, fat, fiber, and moisture. Ash is voluntary, and if it is printed it must be a maximum that follows moisture.
Can I feed a low-ash adult food to a kitten?
Only if the label is for growth or all life stages. Weruva Paw Lickin’ Chicken is an adult food. ORIJEN Original Cat and Annamaet Original Feline are all-life-stage foods.
How do I convert ash to dry matter at home?
Take 100 minus the moisture percent. Divide ash by that dry-matter figure, then multiply by 100. Example: 1.2 divided by 15, times 100, equals 8.0 percent dry-matter ash.
Should I pick the food with the lowest magnesium instead?
Use both numbers. Weruva lists magnesium at 0.018 percent max as fed, and Wellness lists 0.025 percent max as fed. After conversion those two sit closer than the cans suggest.
