Often when a dog decides to stop eating it means that they are going to die. Eleven is an old dog when it is mixed with wolf. Since the dog has been seen by a doctor I would suspect there is not much to be done for this dog save to make him comfortable (manage his pain).
So sorry to hear of his troubles.
Hello,
Wowza. That’s quite a story. I think I would recommend the following options to discuss.
1. Seek a feline exclusive practitioner. If available they are really helpful for the tough cases.
2. Consider an ultrasound.
3. Add cosequin daily
4. Consider an iv fluid hospitalization to really flush out the bladder
5. Xray of the body. May or may not need to do if doing ultrasound
6. Add a fountain, feliway and lots of litter options. Even a very low litter box like a baking sheet.
7. Environmental enrichment. Toys. Catnip. Window seat with bird feeder view. Etc.
Let me know what happens.