Save Jasper a young loving cat

I am infertile so my cat is my son. He got brutally attacked by a dog that somehow got into my private property. I heard a bang and went outside where I saw my cat was and there was the most vicious dog I have seen in my life. I found him hours after the attack up a tree that was way too high for us to retrieve him. My sister and I risked our lives getting him down but while we were trying I saw his guts hanging out of him. After taking him to the vet he went through two surgeries as the damage was way worse than what we thought (hence why we took the surgery route) a part of his liver was in his chest and his lungs collapsed. He survived the surgeries due to his young age and health and is now in critical care in the icu and the bills are piling up. He is my whole life. I also have limited work hours due to chronic pain made worse by being involved in a car crash.