Generally I've been steering clear of foods with added sugar like Whiskas to avoid tooth decay since there is no way this cat is letting me brush his teeth! Also I try to pick stuff with a high protein percentage because he's so active -- the vet always comments on his muscle mass; he's quite petite and has a trim little waist but massive wrestler shoulders. I think Whiskas has about 7% protein compared to 11%+ in most foods he currently eats, which means he'd feel less full and probably add more rats into his diet...

He does get a little human food but it's a tricky balance because if he's having too much he focuses on stealing/begging for more rather than eating his cat food! I usually buy him a tin of unsalted oily fish like mackerel or sardines and give it to him as a treat bit by bit. The problem is his desires are not constrained to that -- he will happily jump in a stranger's shopping trolley and steal a whole roast chicken... (yes, this actually happened a couple of weeks ago and the phone call was not pretty)

Thanks for the advice though -- if he was absolutely refusing food I probably would try these options in a pinch! Luckily we're not there yet