Baytril Responsive Diarrhea Returns

[evvlabs]

My 11 year old lab has diarrhea with tons of mucous, which responds to Baytril within 24 hours. Baytril is given for 7 days. About 2-4 weeks later, the diarrhea is back. No other symptoms.  Have gone through multiple courses of Baytril, and diarrhea returns.  Has been wormed. Tons of lab work - everything is normal. Has been on strict elimination diet for 8 weeks, plus recently added probiotics. Other dog in household is unaffected.

Should Baytril be given for longer than 7 days? How long? Other thoughts?  Considering ACTH Stim and Dextramethasone suppression tests, but why would diarrhea respond to Baytril -- almost instantly -- if it was not just bacteria?  And why can't we get rid of the bacteria?

[suzi-q]

How is your dog doing?  How is the diarrhea?

[peekawho]

You might want to post this on the Vet moderated board, where Dr. Cheng can see it.  

My sympathies.  I've had dogs with touchy colons before.  Its not fun.