Fran -
I'm not sure. I work with rescue dogs and we see a lot of this in larger breeds like bulldogs. I do not know if it makes a difference (breed specific). My first thought was larger breed, hip problems that would cause pressure on the bladder and kidneys (which are right above the tail). Always hate to see anyone pat a dog on the rear above the kidneys. Here's an article I found on line. First I got information by typing in incontinence in spayed female dogs, and then I typed in incontinence in dogs.
I am so sorry for your beautiful girl - I love Pyrenees Mountain Dogs - those extra dew claws are so cool. And a more protective and loving breed? Hard to top.
Here is the article:
The inappropriate urination often occurs when the animal is sleeping or in an extremely relaxed state. Owners commonly report that nighttime is when most of the problems are seen. When the dog gets up from a nap there is a puddle in that spot or a wet spot on the carpet.
"Dogs with urinary incontinence can release a small or large amount of urine. Owners often notice that their dogs seem to be dripping or dribbling urine. In addition dogs with incontinence may lick or clean their genital area excessively," explains Dr. Merle.
The exact cause of urinary incontinence in dogs remains unknown. At the bottom of the bladder is a urinary sphincter. Muscles around the sphincter are squeezed tight to keep urine in the bladder where it belongs until the signal is given to relax and allow urine to flow out of the body. Urinary incontinence may be the result of urine pooling on the wrong side of the sphincter, outside the bladder, or it may be due to loss of sphincter muscle tone.
"Dogs with incontinence tend to have problems with secondary irritation in the genital area. They lick and clean the area more often, leading to raw skin. Often the skin in the area is stained with the urine and the hair is discolored and matted," comments Dr. Merle.
If your dog is urinating inappropriately in the house, it needs to be examined by a veterinarian. Your veterinarian can determine whether the issue is behavioral or there are underlying physiological or medical causes. The first step in most cases is a urinalysis.
A urinalysis can detect a urinary tract infection, which may be the cause of the problem. Female dogs, due to the anatomy of their urinary tracts, are prone to low-grade urinary tract infections. Inappropriate urination caused by an infection will resolve with antibiotics.
If the urinalysis is normal, the next step may be to do blood work and perhaps other diagnostic tests, such as radiographs (X rays) and ultrasound examinations. These tests will rule out other medical conditions, an important precaution before administering any medications.
"There are several drugs on the market now labeled for use in treating urinary incontinence in dogs. Until a few years ago dogs were treated with off-label use of human medications. Phenylpropalanine (PPA) is the most commonly prescribed drug to treat dogs with incontinence. It works by tightening the urinary sphincter," states Dr. Merle.
The dose is entirely dependant upon the dog and the severity of the problem. Some dogs may need to be treated for life. Other dogs may experience an occasional bout with incontinence. Dogs with incontinence often are more likely to have urinary tract infections, both because of the bacteria from saliva when the dog licks the area and because pooled urine is prime ground for bacterial colonies.
