I am not sure if their systems can handle such stuff. Any help would be greatly appreciated. This question was answered by Larry Keller, Wild Birds, Inc., Champaign. Human grade food is not usually appropriate for wild birds. Another common myth is that leftover bread is good for wild birds.
Bread actually has no nutritional value whatsoever for birds.
It fills them up and prevents them from eating more appropriate things that have the nutrition they need. This can be particularly detrimental during the winter.