We feed white bread as a treat, they love it. All we have to do is shake the bag and they come running. We have does that weren't bottle feed that will eat out of our hands. I have read that the starch isn't that good for them but we haven't seen any issue thus far.
I rotate between bread, peanuts and purina horse treats just so they get something different once in awhile plus they seem to like them all and they are healthy for them. I have found out that they prefer pumpkin bread and do not like double fiber bread.