I have a problem, we have six big girls.. and one small 15 pound dog. Whenever the dog goes out into our yard all the chickens rush up to her and surround her and peck at her.. haha our dog is now scared to go potty in the yard! how do we teach them to stay away from her or be scared form her? Our dog just stands there scared half to death and shakes how can we teach them to have boundaries??