Mimi who is 1/2 ND, 1/2 Nubian turned 7 months old the first week in January. She's a healthy little goat. I was told that to breed mini Nubians, I should cross her with a Nubian buck. With my full size Nubians, I put them with a buck at this age. Her dam was around a year old when she kidded, but since Mimi's kids would be 3/4 Nubian, I'm concerned about the possibility of them being larger when they are born. How old should she be before I breed her?