The problem with Marvin is he hates cat treats. Won't touch them. I've tried him on all different kinds, including something called "Feline Greenies" which I've seen some cats go mental for. The only treats he seems to like is Vegemite (sometimes) and honey smoked leg ham - neither of which lends itself to concealing pills.

I have had success crushing the pills up and mixing them through his food... Only two more days of them and he'll be done (hoorah!)