well, i think that's not the same.
we eat what we like most of the time, they it to survive. yea, they can have preferences, but they it what they can get, that's the instinct of survival, so the problem is that i put something that they like more beside something that they don't like so much, as you said with the beef (although i don't really know what those are, since i'm not from US, but sounds tasty).
i think i will give them only pepper from some days and they should it it, OR THEY WILL DIE.
no really, they won't, tuff sons of *****es.