Hi, I brought home a new baby today. She is one year old, I got her from someone who wasn't taking very good care of her

I already had a 6 month old boy. The new little girl seems to hate him--snarls and bites at him whenever he comes anywhere near her. Will this get better the longer they are together. Does this usually happen--anything I can do to make it better. Any advice would be appreciated!!!!!!!!

Sergeant and Bailey's mom