I put netting around my raised beds so the chickens can't get into them. I can let them into beds that aren't planted and keep them out of those that are. I don't mind them getting at the tomatoes after the plants get fully grown because I plant way too many every year and they can only get to the tomatoes near the bottom of the plants. They will eat anything and everything that isn't poisonous to them. They even eat the flowers off my wife's roses.