Muzak is a 21-year-old neutered DSH, in remarkably good health (vet's words). I have him eating Friskies pate (he has to be on wet food). He's eaten it well for several years. However he has by now almost completely lost his sense of smell, and is eating maybe 1/2 - 2/3 of his food. He will however gobble up his Greenies (kitty crack). I want to find something I can mix into his food that will be as tasty as the Greenies. I've seen various additives / toppers etc. but nothing highly rated. Any suggestions as to how to make the food super tasty?