We occasionally get loads of bread to supplemental feed our Dairy cows. Most of them enjoy it very much.
Some of the bread is the traditional white bread - lacking all nutritional value, but some is organic whole grain breads.
One of the older cows is funny. She loves the white bread. You try to slip her a piece of that organic whole grain stuff, she'll pick it up in her mouth and drop it as soon as she tastes it. She's old school...doesn't want any of that organic crap...she wants the white bread!
All other cows love the white and organic bread equally.