I think I read somewhere that nasal drainage from one nostril only could be indicative of a guttural pouch infection, but my age may be effecting my memory :)
Lee ".......and God sought to bestow upon man a supreme mark of his blessing. God created the horse. The horse could run faster than the deer, jump higher than the goat, and endure longer than the wolf. Man, being encompassed by elements that sought to destroy him, would have been a slave, had the horse not made him king."