What types/brands of probiotics do you use for your Yorkies? Are they sprinkled in food (ie: powder form)? My Dreamer has a very sensitive tummy and can't even eat a treat without paying for it later.

I feed Solid Gold Just a Wee Bit kibble and he does well on that--no problems if he only eats dry. I just hate it for him that my others can have treats and he can't, so someone suggested trying the probiotics. I know about Forti Flora and have some of that...is that a good option or are there better ones out there?