Genia, I have the same problem with Perry and Daisy. I know you said you can't stand and watch them eat, that's what we have to do. Perry would eat everything in sight.
Daisy is a very picky eater, she will do everything scratch, look into the kennels, smell everything but eat. I found when she gets really picky, I got some good canned food from the Vet and she will gobble that down as quickly as Perry, after a couple of days I go back to her regular food and she does o.k. again.