You shouldn't feed too many eggs,maybe one a week/fortnight,and no animal needs milk after they are weaned and a lot are actually lactose intolerant.If I was you I would drop the milk/yoghurt and eggs and keep up with the chicken wings supplemented with lamb breast/beef scraps from the butcher/rabbit and some ground veg as they find it hard to digest if it isn't really smashed up.Brown rice is just a filler as well,so not really needed,you can also usually get green tripe from a slaughterhouse,and offal like Ox heart,great stuff,but I usually feed any offal in the same sort of % as you find it