Lucy pretty much covered everything I was going to say. The lactose intolerance thing... Yeah, human breast milk is SO much higher than a cows milk. My daughter and I both are lactose intolerant. I had to give her medicine drops when she was breast feeding to help her digest the breast milk. For me... I either enjoy lactose free milk, or I take a lactaid pill. The pills can get expensive so I only take them for special occasions, like... ice cream! yay!

If you want to lactate that is perfectly fine. Just know that it will be harder for him to digest human breast milk, than goat milk.. *shudders*