Yes your chickens will peck at hedge apples and it doesn't hurt them. Mine do. I put them in the chicken house to help keep bugs out and WELL the chickens like them also--And yes deer and goats do eat them also, Our cows have been eating them but they can choke on them if they don't crush them enough., Lost 2 last year from that so we pick them up and we have wildlife camera and it shows deer eating the hedge apples we have thrown on the other side of the fence from the cows. Let your chickens have fun with them.