All I have read says giving fruit and table scraps, etc. is fine, but not to give to much so that it interferes with their feed. How much is that? I have 5 chickens. I gave them half a pear, the tops of 5-6 strawberries, and a dozen or so grapes yesterday. Is this too much? Could I give them more than that? Giving them scraps from our garden and our table, we'll have plenty to share, so I just want to make sure I don't over-feed this stuff. Thanks for the help!