Help for Henry

Henry is a 6 year old Westie.  He has always been a very happy-go-lucky type of dog. After coming back from a family vacation a few weeks ago, my wife and I realized Henry looked thinner than before. After a few days of him acting odd and not eating much, we took him to the vet. After that vet visit, we left with some antibiotics and a good feeling about what was going on. After a week on the antibiotics, Henry was thinner, still not eating much, and he was very lethargic. We deduced to take him to a different vet to get another opinion. Long story short, they were confused on what was going on and suggested we take him to an animal hospital. Upon admitting Henry to the hospital, we were told upfront the cost could go up to $5,000. I am prepared to pay that to bring Henry back home to our family. I know at only 6, he has a lot more life to live .  The money we are raising here is for any cost in excess of $5,000. If costs do not go above that I will issue a refund to everyone. If they do, it will be to cover those costs. I know this may seem crazy for a dog but he is so much more than that and I can’t face letting him go at this point. Please help us get Henry back!