a really badly behaved dog that lives next door to us some how climbed over a 5 ft fence (covered in a big burly blackberry bramble!!!) into the top of our coop and chomped a little on one of our hens. She's seems to be mostly all right. her left leg is hurt though and the only way she'll eat is by mixing her feed with water. Mostly though i'm concerned because she's doing this strange panting thing. her mouth stays open and she's breathing hard. is this just a sign of pain? is there anything i can do? initially i just thought she was dehydrated but she's been drinking water. help!!