>I refuse to pick the cat food up, as he has to learn to leave it.
What you're doing is the equivalent of expecting a child to eat dry cream crackers while leaving the chocolate cake alone! He won't, I'm afraid. You're setting yourselves up to fail and it'll ruin your building relationship. Cat food is higher in protein than dog food, so will always be tastier. Heavens, even cat
poo is higher in protein than dog food and the contents of litter trays is considered a gourmet treat!
You're going to have to be realistic - what you don't want him to get you must keep out of his reach, at least for several months until he's settled in with you and starting to grow up, but most probably until he's too old and arthritic to be able to jump up against the worksurface.