Hi C_F!
You are one smart cat using the internet and all...about your problem:
you see Scoobs insists on feeding me Kit-e-Kat when what I really want is Whiskas Supermeat, apparently Scoobs says that Whiskas is apostate and food of the devil in this time of the end.
Don't try to argue this one. Whiskas is not apostate, just expensive. So the solution is to make it absolutely the only possible choice. Fake an allergy to Kit-e-Kat: when presented with it take a few bites then go into a wild coughing frenzy, run around the house like you're barking mad, climb the curtains and atack the plants, then suddenly, fall down lie on your back with your feet up. Repeat until presented with better food. (you didn't got this advice from me. This conversation never happened. happy hunting!)
Greven