I'm so sorry to hear about Pepper's illness As Emily says, Baytril, like many antibiotics, can cause havoc with the G.I. system. Has the vet ever suggested keeping him at the hospital for a few days to watch him??? I'm sure you're getting very discouraged by now. But keep your chin up. Sometimes it takes a bit of trial and error, searching for the proper medic., especially considering Pepper's history with G.I. problems. We're sending you our prayers that within the next few days Pepper will be well on the road to recovery. {{{hugs}}}