Poor Zelda! I don't mean to be ugly during your illness but you made me laugh so hard!!! The Cujo kitty remark just finished me off!
There is a nasty liquid medicine that they give at the shelter that also makes them foam and drool. Imagine a room full of slobbering mad kitties!!
I hope Zelda is feeling better soon. It's bad enough to have to take the medicine but then add insult to injury by putting her on a diet! POOR ZELDA! You sure a beautiful kitty, even with drool!!