3 MONTH OLD LAB PUP WITH DIARREAH?

My 3 Month old lab has been having diarreah for 3 days now, i am keeping her hyrdated and im giving her white rice. I can not go to the vet until friday. Her behavior is the same. She has been on Buffalo Blue (true blue) since the day i got her. Any ideas? Any one else have a problem with this food?