Thank you for this great advice. Now. I used to breed exotic birds and bread was a big no no for birds in general. With chicken, I read such a mixed message. Some sources say it is ok to feed them bread like you do and some say no. If so. What kind of bread is good and which one isn't? I am European. I only have rye and dark bread in our house. None of that white bleached bread. Is that ok to give? I would assume that would be healthier than that white stuff? ( Sorry, no offense, but I am not a huge fan of those factory breads. )
A piece of bread here and there will not make any obvious difference to their health.
Bread as a sole diet, or a large percent of their diet, will probably cause dietary deficiencies of some sort. But what deficiencies might be different depending on the bread. I would assume whole-grain bread would be better than bread made with refined white flour, but I don't know specific details.