http://www.vetinfo.com/dmetronidazole.html

The Vet info site link I posted talks about the potentila for liver problems using Metronidazole, because that is where the drug is metabolized. You should read it, Sue, and give Killian a hug from me, or a tummy scritch, whichever the poorbaby prefers. It does say the problems should clear up if the drug is stopped, but again, please read for yourself.