I don't purposely feed them, but all of my chickens have access to our garden. My girls will occassionally snack on a pepper or tomato leaf, but mostly they avoid them. They are a huge fan of eggplants though, and stole almost all of my fruit off of the vines. I had heard about nightshade veggies not being okay, but hadn't really followed up on the research. I say whatever you are doing is working!