TL;DR: If your cat is straining to urinate or visiting the litter box frequently with little output, this is a life-threatening medical emergency. Seek immediate veterinary care to prevent kidney failure or heart rhythm issues caused by a potential blockage.
Why is my cat straining to urinate or visiting the litter box frequently?
- This behavior is often a sign of Feline Lower Urinary Tract Disease (FLUTD) or a urethral obstruction.
- Obstructions occur when the tube carrying urine (the urethra) is blocked by crystals, stones, or inflammatory debris.
- It is a distressing and painful condition where the bladder fills to capacity but cannot empty, causing extreme discomfort.
How urgent is it if my cat cannot urinate?
- This is a critical medical emergency where toxins and potassium build up in the bloodstream, leading to kidney failure and life-threatening heart rhythm issues within 24 to 48 hours.
- Male cats are at a significantly higher risk for complete blockages due to their narrow anatomy.
- You must seek immediate veterinary care at an emergency clinic if you notice straining, vocalizing in the box, or excessive genital licking.
How can a photo or video help the veterinary team triage my cat?
- Sharing a photo of the litter box contents or a brief video of your cat's posture helps professionals differentiate between constipation and urinary straining.
- Visual evidence allows the team to assess the severity of the cat's distress more accurately.
- A photo showing the size of urine clumps (even if they are only the size of a dime) provides vital information on whether the blockage is partial or complete.
Clinical Context (Merck Veterinary Manual)
In cats, frequent attempts to urinate, producing only a fine stream, a few drops, or nothing, along with signs of extreme pain, indicate potential urethral obstruction, an emergency condition requiring immediate treatment. Complete obstruction can cause uremia within 36-48 hours, leading to severe clinical signs such as depression, anorexia, vomiting, diarrhea, dehydration, coma, and ultimately death within 48-72 hours. Palpation may reveal a distended, hard, and painful bladder, if intact. Urolithiasis, a common cause of obstruction, is often suspected based on hematuria, dysuria, or urethral obstruction, and can be diagnosed via urinalysis, urine culture, radiography, or ultrasonography to differentiate uroliths from other conditions such as urinary tract infection or neoplasia.
Chapter: Urology
Source: The Merck Veterinary Manual, 11th Edition (Page 1531)