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A little, and only now and then. A fingertip lick of plain, unsweetened yoghurt is a treat most rats can have, and the RSPCA allows dairy as an occasional treat or training reward. But other care guides advise avoiding dairy, so yoghurt is not a regular food. Skip fruit, sweetened and flavoured yoghurts, and the yoghurt drops sold as rat treats.
| Safe? | Plain and unsweetened, a little, rarely |
|---|---|
| How much | A fingertip lick, about a quarter teaspoon (1 ml) per rat |
| How often | Occasionally, not every week |
| Best served | Plain, natural or Greek style, no sugar or sweetener |
| Watch out for | Sugar, sweeteners, yoghurt drops, loose droppings |
Is yoghurt good for rats?
It is not harmful in a lick, but it is not a health food for rats either, and good sources disagree. The RSPCA says sugary and high-fat foods, including dairy, should only be used as treats and training rewards. RSPCA Australia and Burgess say to avoid dairy, and Unusual Pet Vets lists lactose among foods not to feed. Yoghurt has less lactose than milk because the cultures use some of it up, which is why a small amount rarely causes trouble. We follow the careful middle: a lick, rarely.
How much yoghurt can a rat have?
About a quarter of a teaspoon (1 ml), offered from a fingertip or the end of a spoon, now and then. If droppings go soft the next day, stop. Rats gain weight easily, and full-fat or Greek yoghurt is rich, so count it as a treat.
A lick of plain yoghurt from a spoon is a handy way to hand-feed a nervous rat, and it can make a vet-approved crushed tablet easier to give. Ask your vet first whether yoghurt is fine with that medicine.
Which yoghurts are OK?
| Type | OK? | Why |
|---|---|---|
| Plain natural or live yoghurt | A lick, rarely | No added sugar |
| Plain Greek yoghurt | A lick, rarely | Richer in fat; keep it tiny |
| Fruit, honey or flavoured yoghurt | No | Added sugar |
| Diet or "light" yoghurt with sweeteners | No | Artificial sweeteners add nothing and some are unsafe for pets |
| Yoghurt drops and yoghurt-coated treats | No | Mostly sugar and fat, often very little real yoghurt |
| Plant-based yoghurt (soya, oat, coconut) | Rarely, plain only | Check for sugar and sweeteners |
Does yoghurt help a rat's tummy?
We found no vet or charity source recommending yoghurt to fix a rat's digestion. If your rat has diarrhoea, do not reach for yoghurt: dairy can make it worse. Ring your vet, especially if it lasts more than a day, the rat stops eating, or the rat is young or old. Vets can supply probiotics made for small pets if they think one will help.
Better treats than yoghurt
For a soft treat, try a smear of ripe banana or a couple of blueberries. For protein, cooked egg. Cheese follows the same tiny-and-rare rule as yoghurt. Our safe food list for rats, rat diet guide and pet rat care hub have the rest.
Questions owners ask
Can rats eat yoghurt drops?
We would skip them. Yoghurt drops and yoghurt-coated treats are mostly sugar and fat, and care guides advise keeping sugary and high-fat foods to a minimum for rats, who gain weight easily.
Can rats eat Greek yoghurt?
Plain, unsweetened Greek yoghurt is fine as a fingertip lick now and then. It is richer than ordinary natural yoghurt, so keep it tiny and avoid honey or fruit versions.
Are rats lactose intolerant?
Sources disagree on how well adult rats digest lactose, which is why some care guides say to avoid dairy. Yoghurt has less lactose than milk, so a small lick rarely causes trouble. Stop if droppings go soft.
Can rats drink milk?
It is better not to. Milk has more lactose than yoghurt or hard cheese, and care guides advise avoiding dairy for rats. Fresh water is all a rat needs to drink.