Jen, thanks for the advice. It's definitely worth a try! I hope it's available over here!

Thanks Randi! I'll cuddle her from you and I'm sure she'll appreciate it. Luckily, she's drinking a lot, and she hasn't puked anymore. So I really think it was because of the hair ball, at least I hope so. Just in case she'll vomit again, I'll call the vet emergency, if not, I'll wait till Monday and call Luna's vet. Have to ask her for the wet s/d food anyway.

I think she is supposed to eat the c/d after the s/d diet, to prevent a new developing of struvite crystals, at least this is what the vet has told me.

Thanks for your support!

Kirsten