I'm feeding MannoPro, by default, because there are only four brands available, one of which I won't feed any of their products, the other is a an off color and bigger sized pellets, one contains corn, which I am on the fence about. It's a decent price, and works for me.
I start breeding whenever the doe is ready, which is about 6-7 mos. I actually got one to breed at 4 mos, but she didn't take, and bred her again at 5 mos, and got a litter of 11. I am breeding for meat and show, and trying to work on a fast breed back schedule, which is working for some does and not for others.