HELP SERGIO LIVE !

I bought my Papillon dog January of 2017 from a breeder . Within a short time , he was not eating even after tasting several different high priced dog foods , Sergio was barely eating . It is now May of 2018 and he has only gained one pound since i  got him . Two vetinarians have told me his liver enzymes are very high and they think he has a shunt in his liver . I am 77 years  old  and living only on my social security check . I spent all my social security check in March and April paying for these vet bills. This dog has been my sole companion since my 22 year old grandson was killed on October 3 2016. I have also lost two of my three children and have only one remaining son who lives in another state from where I live in Florida . I have become very attached to my dog and will do whatever it takes to get him the care he needs . The vets say that now he needs an ultrasound and probably surgery for this liver shunt problem . My dog will die if he continues not to eat. I often make him chicken with rice soup, hamburgers  and other home cooked  foods and then I hand feed him but he still refuses to eat. 
I need to raise at least $5000 for the ultrasound and surgery for Sergio. If there is any money left over , i will give it to the humane society to help other animals . 
Thank you for your time