I'm no expert, however, maybe he found something on the floor that he shouldn't have had...? *shrug* I don't know. I do know, though, that Blackie has higher #'s 1 day, and then lower the next. Mind you, I think we're trying to train her liver...? I'm still very new at all of this, and all of the terminology, too. And the feeding, and the dosing, etc. LOL One of these years, I'll get it right (I hope LOL).