Help Pay for My Dog Coppers Medical Treatments

My dog Copper is a German Shepard who is 6 years old. He’s been through a lot of injuries but has been strong enough to pull through his pain. Until now he’s been really sick and my family does not have enough money to pitch in to take him to the vet to see what’s wrong with him. Right now we think he has cancer because he has been losing weight extremely fast, having trouble breathing, and is super skinny, he has not been wanting to eat or walk for a few weeks now. Copper has been nothing but a sweet and fun loyal dog to me and it really hurts me to see him in this condition and not being able to do anything about it. Our only option for now is to put him down and I really don’t want to make that decision. Copper is very loving and has been always around my little nephews all his life. If there’s anything i’m asking for, is to help find the cause for his sickness and finally be able to get him the treatment he needs. Any help that anyone can provide is much appreciated by me and my family because we love him so much.