My Frasier was on phenobarb for over a year for his seizures. It did control them very well. But the hunger was always there, he was ravenous at every meal and he got a little bit chubby. We worked out a fine balance between it all, but it did take some working on since I also have 6 other dogs. I had to contain him alone for food or else he'd wolf his food down and move on to the next dogs's bowl! He was also on prednisone for SLO so he was always thirsty as well and he was ALWAYS thristy, and I cannot tell you how often he drank my soda or iced tea or coffee! Gosh I miss him so much!