Thanks Sienne for the heads-up on the numbers. Julie, so far Gus' tummy is holding up well. The vet did mention that sometimes this AB affects the GI tract and to keep a watchful eye. He said he could switch Gus to another AB if he wasn't able to handle the Clindamycin but wanted to try him on it because he felt it was more effective. Gus, meanwhile, is improving at a fast rate. He hasn't poked at his mouth at all and seems more comfortable. Numbers seem to be changing as well. I re-read your comments on fortiflora, Julie and I'll speak to the vet about getting some. Better to have it on hand and not use it than to need it and not have it. If the clindamycin is so tough on the tummies, I should be prepared. Thanks for that info.