I planted a mulberry seedling in my chicken yard last season and have protected it with chicken wire until it gains enough height that the birds will not peck it to death. My idea is for them to enjoy the berries as they drop and provide a bit of shade in the summer. My sister had a peach tree volunteer in her chicken yard - apparently from a pit in the scraps she throws out. She harvested her first peach last summer - what a bonus. She also has a large deer population and being inside the fenced yard protected it from forage.