I agree with what kurkee said, although I haven't always done it the same way. My wife and I have nursed a few hens back that others where too far gone to save from dog attacks, I guess it helps that my wife is a nurse by profession. Most of them having problems like you mentioned with their eyes. You can use a lot of human things on the birds. We clean wounds with "hurt free" band-aid brand antiseptic as it also has a topical antistatic to help with the pain. You can use a warm damp rag help on his eyes to moisten the dried blood and hopefully help him to open his eyes. As for getting him the additional nutrients we prefer to use Pedialite or Pedia One that is normally for small children. It has a sweet taste that they seem to like as well as having loads of vitamins and electrolytes. We offer it free choice in a water-er, or if they are very bad off have given it directly into their mouths with a syringe multiple times a day until they are able to drink themselves. If he will be still enough feel his leg to see if you can feel a break in the bone, or if he reacts more to pressure in one spot over another, it may be a sprained or dislocated knee. We have also used vet wrap to give some added stability to a joint or broken bone while it heals. If you go that route you need to pay close attention to it that it's not wrapped too tight that it's cutting of circulation. Also it needs to be changed every day or two with a few hour break to let his feathers and leg breath. Keep him isolated but pay close attention,as he recovers you can give him more privileges. We had one hen that stayed in her own coop for 3 weeks not even allowed out into the grass, but she had a broken leg and 23 stitches from a dog attack, no one thought she would live, but with careful care and love she made a full recovery. We named her Lady Luck! Good luck please let me know if I can help at all.