Simba's surgery

Simba our mix Pomeranian and chihuahua was attacked yesterday by another dog. He has two puncture wounds, a dislocated front leg, and a broken leg so close to his pelvis that a cast wont help him. The surgery bills have gone up and we've done everything we could. We are not ones to ask for help, but we want to give him the best chance to fight through this. Any little bit will be most appreciated, Simba means the world to us. Thank you.