Joffers surgery

My name is Susan Jennifer Ramnarain, and I have a pet dog who is a small Yorkie and also my sole companion. He was in the care of a friend due to me having to leave on an emergency with one of my sons. My dog was brutally attacked by a large pitbull while being walked by my friend. He sustained severe injuries to his right back hind leg. He had surgery, which was very expensive, and now requires extensive aftercare, which is also going to be very expensive for me. I am a single woman with one income. I am in need of help in order for my dog to get the best chance to recover.