What might be a sign of excessive worm load in a horse?

Colic or abdominal discomfort can be a significant indicator of an excessive worm load in a horse. When a horse is infested with a high number of parasites, it can experience inflammation in the gut, blockage, or other disturbances in the digestive system, leading to symptoms of colic, which may include rolling, pawing, or showing signs of pain.

Other signs associated with a heavy parasite load could include weight loss, lethargy, and changes in the coat's condition, which might present as dullness or roughness rather than health and vibrancy. While a regular appetite can be noted in some horses, a significant worm burden often disrupts normal eating patterns or overall health. Therefore, experiencing colic or signs of abdominal discomfort is a critical signal that warrants further investigation and possibly treatment for parasites.