Pinworms are small, white round worms which live in the
intestine.
These worms live in the large intestine and around the
anus. The females can be up to 10cm long and lay their yellow, sticky eggs on the skin
around the outside of the anus. This causes intense irritation. Horses
become infected by swallowing the eggs that are rubbed off in the stable or
onto pasture.
The signs include rubbing and biting at the tail base.
Pinworms can affect horses of any age.
Make sure that you use separate sponges for the dock and
head areas.
