This was posted by whispersmom2 on another thread. I realize yours is a male, but I thought it would be something to think about
:
A friend's rescue German Short-hair started have incontinence several years after spaying and was diagnosed as having spaying incontinence. The vet prescribed phenylpropanolamine, the drug in many cough preps. It is not outlawed but the vet works with a pharm. and she is controlled completely while on meds. Let us know what the vet says..
I also found some info that may or may not help you. Let us know how it goes.
http://petcaretips.net/canine_urinary_tract.html