One of our 2 year old laying hens was attacked by our 10 week old lab today. He has been getting increasingly aggressive towards the chickens....we found teh chicken laying face down in the grass with the dog chewing on a wing. It was seemingly lifeless besides a feew twitches. My wife thought it was dead. I came out and picked the chicken up and discovered it was still breathing but not moving and had its eyes closed...its neck has a small laceration and is limp, perhaps broken or damaged. We layed her down in our bathroom floor wrapped up. she is laying still, but breathing. She will not eat or drink. Any advice on what to do from here would be helpful as we are fairly new to chicken raising and this is our first time dealing with an issue like this?