I have a 12 month old gilt and a 9 month old boar. The boar tries to breed the gilt but she'll have none of it. Bites him, snorts and growls and has stayed in her hut for the last two days without food or water just so he can't get behind her. I just moved him back into his own pen and she immediately came out of hers and ate and drank. I bought the pair to take piglets. Any suggestions?