Hello,
Thank you for sending your question to Just Answer!
While I am researching more information for you from my Merck Vet Dictionary, I need to ask you a few questions so that I may reply with an accurate answer.
What symtoms does your horse have?
How old is your horse?
Do you know of any past illnesses or problems with the horse?
How long have you had the horse?
I will await your reply and answer your question right away. Thank you, Tammy