Q. My male dog is 13, and he is losing control of his bladder, just started about 5 days ago.
DR. MASSIMO ORIOLES, DVM, MRCVS
A. It is quite important to differentiate urinary incontinence from inappropriate urination, Considering his age urinary incontinence is probably more likely, although females are usually more affected.
Incontinence is characterized by the INVOLUNTARY loss of urine, which tends to happen when the dog is resting. It often has a gradual onset so the first signs may be a small wet patch on the bedding in the mornings.
In around 80% cases of true incontinence the problem is due to 'sphincter mechanism incompetence', which essentially means that the bladder neck is weakened and cannot retain the urine within the bladder.
On other hand, Inappropriate urination may be caused by other diseases that cause excessive water consumption, such as diabetes, or kidney diseases, or urinary infections and stones and many others.
I would strongly recommend to take him to you veterinarian first for a check up to identify what is the cause of it and then treat appropriately.