Last week, my dog tried to play with my chickens. He ended up injuring one badly and it passed away. Two other chickens were injured. One is looking fine but the other has a large lump under her neck when she sits. She is drinking and I believe eating. She stretches her head down and up but when walking or doing anything regularly, her head is tucked in. I will try to get a picture but does anyone know what this could be? Is she in pain?