Klo reversed sneezed for almost 2 weeks when I got her. The vet wasn't the least bit concerned..nothing will happen, tho it looks awful. I rubbed her throat and comforted her, but apparently, it's not serious. I think it was allergies or distresss. She had never been in a grassy yard, the house and we were strange, odors were different, She stopped as quickly as it began and hasn't done it since. It's enough to make you have a panic attack, huh? It was really scary!