Sure! Its called PetFlora and its available here:
Pet Health Care - Natural Remedies For Your Cats & Dogs
And here is an article I wrote about it:
PetFlora, Holistic Digestion Aid | CupOFdog | Dog Site for Dog People
Pet Flora is much stronger in dogs then a traditional probiotic as it utilizes soil based organisms, much like our dogs would get were they to be happily feasting on a fresh kill off the ground. These organisms are therefore more easily utilized by our doggie's digestive systems. I have had exceptional luck using Pet Flora and I know plenty of other dog owners who have had great results.
If your dog is really yeasty, you may want to consider giving some Zymox rinses in order to attack the current situation...