TL;DR: Urinary incontinence is the involuntary leaking of urine, usually while a cat is sleeping, and requires a veterinary exam within 24 to 48 hours unless accompanied by straining or blood.
What is urinary incontinence in cats and how does it differ from behavioral issues?
Finding that your cat has leaked urine while sleeping can be a confusing and upsetting experience. This condition, known as urinary incontinence, occurs when a cat loses voluntary control over their bladder. Unlike behavioral issues where a cat might intentionally urinate outside the litter box, incontinence usually happens involuntarily while the cat is relaxed or sound asleep, and the cat is often unaware the accident occurred.
Is my cat leaking urine a veterinary emergency?
The urgency level for urinary incontinence is generally classified as Medium, requiring a consultation within 24 to 48 hours. However, you should monitor your cat closely and seek emergency care if you notice:
- Straining to urinate
- Signs of pain or distress
- Lethargy
- Visible blood in the urine, which could indicate a critical blockage
Why should I take a photo of my cat's urine spot for the veterinarian?
Providing a photo of the urine spot can be incredibly helpful for your medical team by documenting the following:
- The volume of the leak and the color of the urine
- Signs of infection or inflammation, such as pinkish or cloudy urine
- A strong odor that provides clues about potential issues
- Any staining or irritation on your cat's fur to assess the severity of skin contact
Clinical Context (Merck Veterinary Manual)
Urinary incontinence in cats, manifesting as urine leakage, can arise from various causes, including urethral incompetence, anatomic defects such as congenital ectopic ureters, or overflow incontinence secondary to partial urethral obstruction. Non-neurogenic causes include idiopathic urethral sphincter incompetence. Neurologic etiologies can be categorized as upper motor neuron (UMN) or lower motor neuron (LMN) lesions, with LMN lesions resulting in a distended, easily expressed bladder. Dysautonomia, a multisystemic disease in cats, can also lead to urinary incontinence of LMN origin. Functional obstruction due to detrusor-sphincter reflex dyssynergia, resulting from incoordination of the normal micturition reflex, can also cause urine leakage.
Chapter: Urology
Source: The Merck Veterinary Manual, 11th Edition (Page 1524)