Why is there swelling and discharge from an older mare?

Swelling and discharge from an older mare may indicate a reproductive issue, such as uterine infection (metritis) or a retained placenta, which can lead to inflammation and fluid accumulation. Additionally, age can contribute to weakened connective tissue and hormonal imbalances, increasing the risk of conditions like endometrial cysts or uterine tumors. It's important to consult a veterinarian for a proper diagnosis and treatment plan, as these symptoms can signal serious health concerns.