http://www.canine-epilepsy-guardian-...lk_thistle.htm
Susie, I was researching cleansing liver for canines, and found this website. It is a long article, but toward the bottom of the page, is information about milk thistle.
Interesting and addresses pheno & effects on liver. Perhaps you could read and mention to your vet. Others may have input also since there are a few in YT that utilize homeopathic medications.
-Deborah