I have been leaning and enjoying my chickens since July of last year! Have just moved them to there new coop with a very nice run. I feed them the crumble from feed store which they always have along with lots of water. I try to save things from my kitchen as I cook like veggies to gave to them along with other things like bread fruit, my fear is not to gave them anything that will harm them. How do I know what not to gave them??