Hi,
The problem is the female is too young for breeding, and she should not be introduced to a male at this age. You need to wait at least another year before introducing them. A young hen is at a high risk of becoming egg bound & dying. She is still developing physically and emotionally and does not have the muscles needed to safely pass an egg through her reproductive system. She is definitely not mature enough yet, and the male knows this, which is why he is biting at her. Another risk is he will get frustrated with her and kill her. Please keep them in separate rooms to give her time to finish growing up. You also need to understand that if you do put them together once she is old enough, she will no longer be a pet. Breeding birds need to be able to bond without distractions. When they do eventually bond, they will lose interest in people. And if you continue to try to interact with her once she has a mate, the mate will try to attack you, and if he can’t get to you, he will attack her. So if you want her to remain tame, do not put her with the male and try to breed them.
Thank you for asking Lafeber,
Brenda