Urinary incontinence is the involuntary passing of urine. Pets can be incontinent for many different reasons. Those reasons can involve the bladder, the urethra which is the tube from the bladder to the outside, or incontinence can be caused by abnormalities in the parts of the brain and spinal cord that control bladder function.
As pets age they may become incontinent. This may be due to a weakening of the muscles that hold urine in the bladder. There are many diseases that can cause a pet to create more urine than normal (polyuria) and several of these occur in older pets. If a pet has one of these diseases and often has a full bladder, the full bladder can push against the weakened sphincter and cause incontinence. Older pets can also develop senility and simply be unaware that they are dribbling urine.
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