Is your cat's food safe? What a 2026 study found about lead and heavy metals

Last updated 11 October 2026

Most cat food is safe to feed, but almost all of it carries small traces of heavy metals. A US test of 100 cat foods from 62 brands, published on 2 October 2026, found lead in 99% of them, cadmium in 96% and arsenic in 94%. Levels varied a lot between products, and the report doesn't show that any of them made cats ill.

Below is what the study found, why heavy metals matter for cats, what the limits are (and the gap in India), and how to choose a healthy wet cat food with less of them.

The study in brief

The study was run by the Clean Label Project, a US nonprofit that tests consumer products. It bought 100 cat foods in three formats: 31 dry, 40 wet (cans and pouches) and 29 air-dried or freeze-dried. An ISO 17025-accredited lab tested each one for more than 122 contaminants.

Two points matter when you read the headlines. First, the report measured contaminants per 1,000 kilocalories, not per kilogram of food. That's fair to wet food, which is mostly water, but it means its numbers can't be compared directly with legal limits. Second, each product was tested once, from a single batch.

Is there lead in wet cat food?

Yes, in most of it, but less than in dry food. After allowing for calories, dry food carried about three times the lead of wet or air-dried food, whatever the protein. The report says this points to the format of the food, not one particular ingredient.

Lead was also higher where plant ingredients outnumbered the named meat or fish among the first ten ingredients. Turmeric stood out in the group's wider data, and has a known history of lead adulteration through colouring. That's one more reason not to add haldi, masalas or leftover curry to your cat's bowl.

Is fish cat food high in mercury?

Fish is the clearest link in the whole study. Foods with fish or seafood in the name had about 18 times the mercury of other foods, and among wet foods the gap was about 28 times. Nearly half (48.6%) of fish-based foods ranked among the highest for mercury. No poultry-based food did.

Mercury builds up through the marine food chain, which is also why the US FDA advises pregnant women to choose low-mercury fish. Herring meal, tuna and fish broth were the ingredients most linked to higher heavy metals.

That doesn't mean fish is off the menu. Some fish foods scored well. If your cat eats only fish, though, it makes sense to rotate in chicken or another protein on some days.

Where do heavy metals in cat food come from?

Nobody adds them. Lead, cadmium, arsenic and mercury occur naturally in soil and water, and they reach food through crops, animals and fish. The US Food and Drug Administration says eliminating them from animal food entirely is not always possible for this reason. Brands can lower them through ingredient sourcing, supplier testing and testing the finished food.

Packaging is a separate source. DEHP is used in flexible plastics. It showed up at similar rates in wet and dry food, but where it was found, cans and pouches had about five times as much. BPA, an older packaging chemical, was found in only two products.

Are heavy metals harmful to cats?

At high doses, yes. All four metals build up in the body over time, and the kidneys carry much of the load. The study's authors point out why that matters for cats: chronic kidney disease is among the most common causes of death in older cats, and most cats eat the same food every day for years.

These effects come from poisoning-level exposure, such as a cat licking lead paint dust or eating badly contaminated food. Nobody has shown that the trace amounts found in this study harm cats. The sensible view is that lower is better, without panic.

What are the limits for lead in cat food?

It depends where you live, and in many places there's no binding limit at all.

The study itself doesn't say whether any product broke these limits, because it reported results per calorie rather than per kilogram.

Can cats get lead poisoning at home?

Yes, and in India the bigger risks are often in the house, not the bowl. The MSD Veterinary Manual reports cats swallowing lead while grooming dust off their fur, such as dust from sanding old lead-painted woodwork. A chip of old lead paint the size of a thumbnail can hold 50–200 mg of lead.

• Sindoor, kumkum and roli. Health officials in Multnomah County, Oregon, USA, found sindoor brands that were 37% and 43% lead. Lead is sometimes added to brighten the colour or add weight. These powders are everywhere during Navratri and other festivals. Keep the puja thali and the sindoor box out of your cat's reach, and wipe up spilled powder rather than leaving it on the floor.
• Old paint. If you're scraping or sanding old walls, doors or grilles, keep the cat in another room and clean up the dust with a damp cloth.
• Spices and kitchen leftovers. Don't add turmeric or masala to your cat's food, and don't share curry.

What are the signs of lead poisoning in cats? Sudden poisoning shows as poor appetite, changes in behaviour, wobbly walking, tremors and fits. Longer, low-level exposure can cause tummy pain, vomiting, diarrhoea, tiredness, weight loss and anaemia. A vet confirms it with a blood test, so see one the same day if you notice these signs.

How to choose a healthy wet cat food with fewer heavy metals

1. Mix in wet food. Dry food carried about three times the lead in the study.
2. Rotate proteins. Alternate fish with chicken or another meat rather than feeding fish every day.
3. Read past the first ingredient. In 35 of 100 foods, plant ingredients outnumbered the headline meat or fish within the first ten. Shorter lists with fewer grains and fillers carried less weedkiller and less lead. Our guide to choosing a wet cat food shows how to read the label.
4. Don't heat food in the pack. Spoon it into a steel or glass bowl to warm it, and store leftovers in a lidded steel or glass container, not the open pouch. See how to store wet cat food for timings.
5. Cat-proof the puja corner. Keep sindoor, kumkum and old paint dust away from your cat.

One caution: don't switch foods in a panic. A complete food your cat actually eats is still the priority. If you change, move over about a week.

Common questions

Is cat food safe to feed?

Yes, for most cats. Traces of heavy metals are in almost all cat food, but the study didn't show harm at these levels. Lower is still better.

Is there lead in cat food?

Traces of lead are in most cat food. A 2026 US study found lead in 99 of 100 products tested. Levels varied widely between products, and the study didn't show that any food harmed cats.

Is wet or dry cat food safer for heavy metals?

In the 2026 US study, dry food had about three times the lead of wet or air-dried food, even after allowing for calories. Mercury depended on protein, not format: fish foods were highest.

Is tuna cat food safe?

Fish and seafood foods carried much more mercury and cadmium than poultry foods, and tuna was among the ingredients most linked to higher levels. An occasional fish meal is fine for most cats. Avoid a fish-only diet.

Is there a legal limit for lead in pet food in India?

We know of no mandatory limit. The Bureau of Indian Standards has a dog and cat food specification, IS 11968:2019. The EU sets a legal maximum of 5 mg/kg of lead in complete pet food. The US has no legal limit.

What is the healthiest wet cat food?

There's no single best brand. Look for a complete food for your cat's life stage, a named meat first, few grains or plant fillers, and rotate fish with poultry. In the study, poultry-based and wet foods tended to carry fewer heavy metals.

Can sindoor or kumkum harm my cat?

Some sindoor brands tested in the US were over a third lead by weight. Cats can swallow powder by licking it off their fur or paws, so keep these powders out of reach.

About CanDost. We make CanDost wet cat food in our plant in India. Our pouches are real meat or fish and water, with no grains, no plant fillers, no thickeners and no preservatives. Serve it in a bowl and store leftovers in a lidded steel or glass container. Have a question about our food? Write to us at support@candost.in. See CanDost wet cat food

Sources

India doesn't yet have consumer guidance on heavy metals in pet food, so this guide uses the US study, US and EU rules, and veterinary references.

• Clean Label Project, Heavy metals found in up to 99% of cat food products tested across 62 brands (published 2 October 2026)
• US Food and Drug Administration, Center for Veterinary Medicine, CY15–17 report on heavy metals in animal food (24 October 2019): no FDA limits, and NRC and AAFCO tolerable levels
• European Union, Directive 2002/32/EC, Annex I: maximum levels of undesirable substances in animal feed
• MSD Veterinary Manual, Lead poisoning in animals
• MSD Veterinary Manual, Mercury toxicosis in animals
• Tahir I. and Alkheraije K.A., A review of important heavy metals toxicity with special emphasis on nephrotoxicity, Frontiers in Veterinary Science, 29 March 2023
• Multnomah County Health Department (Oregon, USA), What to know about lead in cultural products, turmeric