Yellow: with caution
A teaspoon of natural yogurt is an acceptable exception for a cat that tolerates dairy products. It is not healthy in the sense of necessary. By the way, the sources don't entirely agree on this, and that's part of an honest answer.
Why the traffic light is yellow
Yoghurt is a dairy product, and dairy products cause problems for many adult cats. According to the ASPCA, pets produce little lactase, the enzyme that breaks down milk sugar. Diarrhea and indigestion are the result. In a review article by PetMD, veterinarian Sandra C. Mitchell lists yogurt as one of the foods that cats should not be given.
Another, veterinarian-approved PetMD article is milder: Small amounts as a treat are okay. Acidified milk products are often better tolerated because some of the lactose is broken down during fermentation. However, the experts quoted there believe that the fact that yogurt cleanses the intestines is a myth: it does not contain enough lactic acid bacteria and not enough calcium to meaningfully supplement the diet. Both result in yellow: no poison, but no gain either.
What you should pay attention to
- Only natural yoghurt: No sugar, sweeteners, fruit or flavors. Sugar-free products may contain xylitol, which the ASPCA says is dangerous to pets.
- Teaspoon instead of bowl: For fruit yogurt, PetMD lists less than a teaspoon as the upper limit, and that only for cats without lactose problems.
- Not if you are overweight or diabetic: Sweetened yogurts provide carbohydrates that are not good for such cats.
- No substitute for probiotics: If your cat has diarrhea, it should be in the hands of a vet, not in the yogurt cup.
What to do if your cat ate yogurt?
If your cat has licked the yogurt cup, expect flatulence or soft stool. This usually goes away on its own. If the diarrhea or vomiting lasts longer than a day, or if it was a sugar-free yogurt with sweetener, call the vet's office.
If poisoning is suspected, go to the vet immediately or to the veterinary emergency service.
Treats and extras are part of the daily ration, so subtract them from the regular food. The cat food calculator.
shows you how much your cat needs in totalRead more
Sources, accessed on 05.11.2026: ASPCA, People Foods to Avoid Feeding Your Pets (ASPCA Animal Poison Control Center); PetMD, What Human Food Can Cats Eat? (Sandra C. Mitchell, DVM); PetMD, Is Milk Bad for Cats? (tierärztlich geprüft von Katie Grzyb, DVM); PetMD, Can Cats Eat Strawberries? (Sandra C. Mitchell, DVM)
