I guess because some people consider it junk. Shoot I also ways gave my old steer Hershey Kisses, and the one before him liked the Salsa Verde Doritos or potato chips with lemon, the one now will KILL for Cheetos! Feeding it to them is fine that I see, as long as it's not their main diet or anything. My lamb always wanted what I had, and I shared. I think there may eventually be a limit on how much chocolate sheep and goats can handle.
Was she talking about that the students couldn't feed it to them, or that you can't give it to them in general?