Hi, i have 2 new zealand x californian does which have both just produced nice litters that i expect to reach between 4 and 6 lb's at 10 weeks a nice killing size , if left to reach maturity they should make 10/11 lb's, i dont fatten mine on concentrates , just a wee drop bruised barley/oats, hay,and an abundance of fresh greens and fruit and veg