We're buying some new goats)yay!) but are going to feed them a bit differently than what they're on now. What's the best way to change and over what period of time? Also, they haven't been allowed free access to browse and we have 5 acres for them. Should i limit the time they're out? For how long? We're getting nubians from Jennie and I think it's a great fit for us. One more thing, our boer cross doeling is 6 weeks and the doelings we're bringing home are 12 weeks but our boer cross is way bigger than these new girls. Should i worry about any fighting, etc.? Thanks all!