Wow. Thank you for the information!
I went to the vet yesterday and asked about switching from the Denamarin.
I'm definately going to put her on the hapato support. (love the extra b vitamins) and probably try denosyl with that instead of the Vetri DMG. I don't know why..I just feel that denosyl might be better.
We also switched from Hills i/d to Royal Canin Hepatic. *Crossing my fingers we get her throwing up under control now!*