LGD

I have a 4 year old Great Pyrenees that I took in 4-6 weeks ago. She was underweight and chewed her back bare. Since she’s gained weight and her fur is growing back. She is now in heat and has killed 3 birds. She has previously lived with birds and goats.

When I’m around she’s fine and pays no attention to the birds. Any advice? Will she teach my other LGDs to attack?