Two year old neutered dog

Anatolian/Akbash raised with kids, sheep, goats, cows, horses, and chickens free to good farm or working lgd home. He is a great patrolling dog and we have never lost anything to coons, coyotes, mountain lions etc. His only issue is he is food aggressive so needs to be fed away from stock. Reason for rehoming is we have his sister also and they are so closely bonded they tend to roam if left together, he stays put if one of them is penned up. UTD on vaccinations and wormed recently as well.