Join Date: Feb 2012
Location: The land of Enchantment
Since it souinds like she is at a boarding barn, if I were you I would go over all the details of the last 2 weeks - especially her contact w other horses. If none of the horses she has had contact are "new" to the barn, and there has been no additional traffic it would at least reduce the possibility of flu. I am sure she was vaccinated for the most probably local strains, and hopefully for strangles. It is all info a vet will find usefull.
But it could be anything. If for nothing more than peace of mind, I would call the vet.
There is just as much horse sense as ever, but the horses have most of it.