TL;DR: Passing small drops of urine often indicates bladder irritation or infection; while usually requiring a vet visit within 24 hours, a complete inability to urinate is a life-threatening emergency.
What does it mean if my dog is only passing small drops of urine?
When a dog repeatedly tries to urinate but only produces a few drops, it is usually a sign of bladder or urethral irritation. This behavior, often accompanied by straining, suggests that the bladder wall is inflamed, making the dog feel a constant, urgent need to go, even when the bladder is nearly empty. Common causes include urinary tract infections (UTIs), bladder stones, or crystals.
Is it a medical emergency if my dog is straining to urinate?
- The urgency level for this condition is Medium if your dog is still successfully passing some liquid.
- Schedule a veterinary appointment within 24 hours to prevent the condition from worsening.
- If your dog is straining and no urine at all is coming out, this is a medical emergency known as a urinary blockage and requires an immediate trip to an emergency hospital.
How can taking a photo or video help my veterinarian triage my dog?
- Capture a photo of the urine on a light surface to show the vet the color and whether it is cloudy or tinged with blood.
- Record a video of your dog's posture while they attempt to go to show the intensity of the straining.
- These visuals provide vital information that helps your veterinarian determine how quickly your pet needs to be seen.
Clinical Context (Merck Veterinary Manual)
Failure of normal voiding, characterized by frequent attempts to urinate with stranguria and passage of only small amounts of urine, can stem from several causes. Mechanical obstruction of the urethra by calculi, neoplasms, or strictures can lead to this presentation, as can detrusor atony from overdistention of the bladder, or neurologic disease. Partial obstruction of the urethra can lead to bladder distention and overflow incontinence. Urge incontinence, resulting in small urine leakage, is often associated with detrusor irritability, commonly seen with cystitis. Neurologic causes, categorized as upper or lower motor neuron lesions, can also disrupt normal voiding. Lower motor neuron lesions, specifically those affecting the sacral spinal cord or pelvic nerve, or resulting in detrusor atony, are often characterized by a distended, easily expressed bladder.
Chapter: Urology
Source: The Merck Veterinary Manual, 11th Edition (Page 1524)