I think those are all of my grain recipes, OGG, as they have morphed along the way. I had peas and barley in my mix only because I was rotating them out of our food storage. They will occasionally get these "bonuses" as we replace stored goods with fresher ones.
I am currently feeding:
4lbs oats
4lbs barley
1lb beet pulp
1lb BOSS
There is a lot of fat in the older animals I have been processing, though it varies with each one. Maybe I need to feed less grain. :?
The hay you have will probably be fine. If you buy alfalfa cubes and they really go after them, your hay may be lacking enough protein. You can probably just feed more grain to up the protein. I find that my rabbits prefer baled hay, but I also give cubes as a "chew toy" type treat.
The natural and grain feeding is fairly "new", at least since commercial pellets became common, so I don't think there are any hard and fast rules. You need to experiment and see what works for you. Even when feeding pellets there is variation because the quality is so varied between brands. Basically, your herd will develop to accept whatever diet they are on because you will keep and breed only the ones that thrive on it.
I think that feeding weeds and fresh greens make for healthier animals over all, but those too will vary with the seasons.
