My terriers get roughly 1/2lb, 30lb whippet gets 3/4 and 60lb lurcher anything from 1.5 to 2.5lb. but this can change daily, i look at the dogs and think they are putting weight on i reduce it, a bit thin, increase it. Sometimes top it up with complete food, other times dont. All depends upon their levels of exercise/work at the time. Some days they get absolutely stuffed full if eating whole rabbits or cooked food, some days they are not fed at all.