This morining when i went out to feed and water my chickens i noticed one of my smaller breeds (silver lakenvelder) was all beat up. She only had 1 tail feather and alot of her body feathers were pulled out. I thought the pecking order had changed but then I saw a rat stuck in the chicken wire and it was chewed up, it looked like it was trying to get out. is there anything i need to do to treat the chickens for anything and how do i get rid of the rats???