07/11/2025
Pyometra in Dogs
Pyometra is a serious and potentially life-threatening infection of the uterus that commonly affects unspayed female dogs, especially those middle-aged or older. It usually occurs several weeks after a heat cycle, when hormonal changes cause the uterine lining to thicken and bacteria gain access through the cervix.
**Clinical Signs to Watch For:**
- Vaginal discharge (often pus-like or bloody)
- Swollen abdomen
- Loss of appetite
- Increased thirst and urination
- Lethargy or weakness
- Vomiting and fever
- In severe cases, collapse or signs of shock
There are two types:
- **Open pyometra** – with visible vaginal discharge.
- **Closed pyometra** – no discharge, making it harder to detect and more dangerous as the infection stays trapped inside the uterus.
Prevention:
- **Spaying (ovariohysterectomy)** is the most effective way to prevent pyometra.
- Avoid unnecessary hormone or heat-suppressing medications.
- Regular veterinary check-ups for intact females, especially after heat cycles.
- Monitor your dog closely for signs of illness 4–8 weeks after each heat cycle.
If you suspect pyometra:
Seek immediate veterinary attention. This condition requires prompt treatment.