My dog has serious allergies and she always has upset stomach and she also has food allergies which she is on a special diet. So my dr told me to get her the activia yogurt what kind should I get plain are the one with the fruit in it and how often should i put it in her food because I know if you give then to much they can get diarrhea . How much should I give her she is only 9 lbs.
Maybe no one knows the answer to your question. After all, none of us are vets. There is a vet tech on the forum, but I haven't seen her around for awhile. As the other poster said, you're best off calling your vet and asking. What if someone here gave you the wrong answer?
I would give her the plain yoghurt, and since she's small, perhaps a teaspoon or two, once a day. I'm surprised that when your vet told you to feed her the yoghurt, he didn't give instructions. A quick phone call would clarify that though. Good luck.