We have a few apple trees in the yard (and a few more through out the pastures and property.) Along with plum, choke cherries, wild grapes, etc.etc. The birds will pick at all of them at their own wanting. I actually see the geese eatting more than the chickens. It usually seems like it's the geese, ducks, chickens, turkeys, and then the guineas in that order eatting the fruit. Now if I cut up the fruits for them it's a different order, but when it's free choice on the ground they seem to have order..lol
All our birds are still living and health. None seem to have a problem...Although I did see a goose get an apple stuck on her beak. She was trying to eat the apple and another goose tried to get it, the next thing I knew goose #1(Geesey-Geesey) had the apple stuck on her beak and she was chasing goose #2(Eve)..It was kinda comical...