thanks for your replies so far... almost 99% certain he has chewed or bitten it... I have seen him reach round and chew his actual sheath before now but he has never done much more than surface damage, this is the first time he has gone that little bit further back to open the scar up. I can get...
My horse suffers from moderate sweet itch. he is 17 years old this year, and I have owned him for 5 years. He rubs incessantly and all I can do is cover him up in a sweet itch rug - the only bits not covered are his legs and his sheath.
I do live on a greek island - however it is around 3 or 4...