He has been with me since birth and has endured numerous challenges, including parvo, three accidents that resulted in fractures in both legs, kennel cough, and another virus. Despite all this, he fought through and emerged strong. However, for the past three days, he hasn't been eating. The vet said he's not living a happy life. I've done everything to shower him with love, but I feel helpless and don't know what else to do.