I am thinking she’s not used to you yet and is protecting her little ones. Plus in a larger herd the often aren’t handled by humans as often and maybe a little off from going to big herd to the 3 of them It will take time to adjust. I’m not familiar with those breeds as much. My friend did ask breed to maybe help find a way to defuse the situation and still grow a bond. It my be you do need to be stern. I’ll get with him as he has those breeds Is it getting better over time? Goats are odd creatures sometimes hard to figure out