Treat straining to urinate as urgent — and as an emergency if your guinea pig cannot pass any urine at all. Guinea pigs are very prone to bladder stones and infections, which cause straining, blood in the urine, squeaking in pain, and frequent tiny wees. A stone that blocks the outflow so no urine passes is a life-threatening emergency. See an exotic or small-animal vet the same day, and go straight in if nothing is coming out.
## Why guinea pigs get bladder problems Guinea pigs form bladder stones and "sludge" readily, partly due to how they handle calcium. Stones and infections irritate the bladder, causing pain and blood. A stone lodged in the urethra can block urine flow entirely — which quickly becomes fatal without treatment.
## Signs to look for - Straining in the litter area, often with little or no urine produced. - Squeaking or crying when urinating (a classic sign of pain). - Blood in the urine or a red/pink tinge with straining. - Frequent small wees, a wet or stained bottom, or a hunched posture.
## What to do See a vet the same day. If your guinea pig is straining repeatedly but passing no urine, treat it as an emergency and go now — a blockage is life-threatening. The vet can image the bladder for stones, treat infection, provide pain relief, and remove a stone if needed.
Get to a vet immediately if you see any of these
- Straining repeatedly but passing no urine at all
- Crying out or squeaking when trying to urinate
- Blood in the urine
- Frequent tiny wees with a hunched, painful posture
- Straining with loss of appetite or lethargy
Common questions
How do I know if it's a blockage or just a sore bladder?
A guinea pig that strains but produces no urine may be blocked — an emergency. Straining that still produces some (often bloody) urine is urgent but usually not immediately blocking. When unsure, treat it as the more serious possibility and go in.
Why are guinea pigs so prone to stones?
Their calcium metabolism makes them form bladder stones and gritty "sludge" readily. Diet and hydration influence the risk, so ask your vet about prevention after treatment.
Is blood in the urine always serious?
It should always be checked promptly, as it usually signals a stone or infection. Note that harmless plant pigments can also tint urine, so a vet's urine test tells them apart.
Sources
This page is general guidance, not veterinary advice, and cannot diagnose your pet. It does not replace an examination by a licensed veterinarian. When in doubt, treat it as an emergency and contact a vet or your nearest 24/7 emergency clinic right away.
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