Involuntary Passage of Urine
Involuntary passage of urine normally occurs while your pet is asleep or resting. When she stands up, you notice urine leakage. It can be just a small wet spot or a good-sized puddle, depending on how much urine is being unintentionally passed.
It’s important to understand your pet isn’t intentionally leaking urine. She has no control over what’s happening. This is not a behavioral problem, it’s a medical problem — so trying to correct or punish your pet is a bad idea on multiple levels.
In fact, many pets become very distressed to realize they are passing urine in places other than a designated potty spot. A housebroken dog or any kitty accustomed to using a litter box will be confused and even ashamed to know they are leaving urine in inappropriate spots. (Source: Huffington Post)