i feed red mills engage which they like especially salmon and do well on it but i'm a slaughterman so mine also feast on fresh beef,lamb,tripe,paunches,sheep heads,red,fallow,roe,alpaca,water buffalo,goat,rabbit pheasant,hare and all there offals.just got hold of 10 kg of duck carcass yesterday and they never touched it.thats the only thing they have ever turned down.