These kids are too big to get through the fence (which is likely mostly psychological, since Kezzi could do it as a yearling), so if I remember to chain the gate shut, the division is solid. ... Unless, that is, that the *mom* wants to enable the kid to nurse.
Ginger-goat has figured out how to stand next to the fence so that her son Simon can stick his head through, rotate sideways, and nurse until she is done and walks off. Since it is Ginger's choice, I can't complain much about it. But really!