I feed Country Acres basic rabbit formula, 16% protein. Not a clue what's in it, the ingredient list goes, "grain by-products, forage products, roughage products, grain products, plant protein products, molasses products", followed by the chemical names of all the vitamins and minerals in it, and a preservative. The buns do just fantastic on all those "products" though. :shock:
I no longer feed rabbit pellets because of the experiences of other raisers who have had bad batches of feed... I don't want to feed corn to my rabbits for fear of the mytotoxins that moldy corn can have- and calf manna contains a lot of corn.
Humidity encourages mold; what's the driest, most humidity-controlled place you have? Your house. I keep the pellets and the calf manna in the house. Just scoop up what you need on the way out the door. I've had feed go moldy outside, but not once since I moved it inside.
I feed calf manna just to nursing does for the first three weeks after they kindle. I use one of those funny half-sphere shaped spoons for measuring coffee, it gives me just the right amount. I think its supposed to be a tablespoon. Since only the nursing does get it, a 10 pound bag lasts me a long time. And the does don't lose condition anywhere near as much with the calf manna.
I also feed hay on a regular basis, my preference is for orchard grass because it doesn't trigger my hayfever.
I turned hay time into play time. I found some heavy duty wire vase-shaped frames at a fabric/hobby store. My hand just fits through the narrow part of vase neck. I suspended the frame on its side from the cage top, right by the door so its an easy reach. I stuff the hay inside, and they have a blast. The vase swings, so they bat at it, stand on their hind legs and hold it with their forepaws, even climb on it. There is almost no hay waste at all since I added the vase shaped feeders. :bunnyhop: