I just looked at the Metacam information on a couple of sites and while most of the warnings are about repeated use there is some concern about occasional severe reactions, and vets not using as specified on the box so definitely worth chatting with your vet about.
I don't think I contributed much other than caring but thank you's are always nice I hope they all stay well and that changing food and everything makes sure nothing recurs.
And of course, if you manage to get any pictures of this little star when you bring her home I'm sure I'm not the only one who would love to see her.