I feed 'RAW' rabbit(with the fur for the terrier and without for the whippet),and,lamb,chicken,beef,and,I would feed the odd squirrel when they come along(as is),I also feed minced veg,and a teaspoon of oil on the food.As an additive I also sprinkle on 'Keepers Mix' & 'Easy Green' from Dorwest Herbs.They also get the odd bit of fruit,and,natural(live)goat yoghurt.
The problem(apparently)with feeding too much rabbit,is that the rabbit is very high in protein,and,this can have an adverse effect on a dog.So,I would cut back a bit with the rabbit,but,it is a personal thing if you want