Sorry I just saw this! Poor Hazel. I sure hope she feels better soon. Going through these posts, I was wondering if the medicine is causing her to vomit? Is it primarily after she takes meds, or is it random. If she continues to vomit, you could ask your vet for some reglan, as it should calm upset tummies and you can use it in conjuction with any other meds that she is taking.

I'm glad that she's not losing weight or dehydrated. That is good news. Do keep us posted on the blood test results!
**hugs**