Welcome and thanks for asking your question. My name is***** am a licensed veterinarian. I am sorry for the delay in response. If you would like to continue can you please answer a few questions so that I can be well informed and give you the best advice.There may be a slight delay between your follow ups and my replies as I type out a thorough reply for you.
1- Did your vet do any testing like xrays, blood work, etc.?
2- Any pre existing medical conditions?
3- Is he drinking more than usual?