Why?
As yogurt ferments, its live cultures use up some of the lactose, which makes it easier to digest than milk. There's still enough left to upset a lactose-sensitive cat, though. The bigger danger is what gets added: sugar, fruit, flavorings, chocolate, or sweeteners like xylitol.
How much?
A teaspoon, once or twice a week at most. Only plain yogurt with no added sugar, and check the label on light versions, which sometimes contain sweeteners.
The risks
- Diarrhea or bloating in lactose-sensitive cats
- Fruit or sweetened yogurt: unnecessary sugar
- Xylitol in some light or sugar-free yogurts
- Chocolate yogurts and desserts are toxic
Your cat ate some: what now?
A few licks from a cup of plain yogurt aren't serious. Watch your cat's stool for 24 to 48 hours. If the yogurt contained chocolate or xylitol, or if diarrhea lasts, call your vet.
Better options
Lactose-free milk made for cats is a treat without the tummy risk. If it's about digestion, ask your vet about a probiotic designed for cats.
Common questions
Can cats eat Greek yogurt?
Plain, unsweetened Greek yogurt is fine in tiny amounts. Straining removes some of the lactose, but full-fat versions are richer, so a teaspoon is still the limit.
Is yogurt a good probiotic for cats?
The cultures in yogurt are chosen for people, and there's little evidence they do much for cats. A probiotic made for cats is a better bet, and diarrhea that lasts more than a day or two calls for a vet visit.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.