I'm worried about Riley. A few days ago he started sneezing out of the blue whenever we go outside or he gets excited. No other obvious signs of illness. No nasal discharge. No reverse sneezing. Just repetitive sneezing - mainly within seconds of going outside. I took him to the vet on Friday and he was prescribed a course of Vanectyl-P to try and rule out allergies as a cause. We were supposed to start with 1 tablet twice per day but he has a history of seizures/movement disorder so I decided to just give it to him once per day until I can call the vet about this concern (we recently switched over to our backup vet so he isn't familiar with my boy's full history). On the plus side Riley hasn't had the rapid breathing that he got with other antihistamines but so far we also haven't seen any improvement in the sneezing At first I thought maybe Riley got something in his nose I but would have expected to see some discharge by now if that was the case. So that has me worried about a nasal tumor. Two of my sisters have lost pets to nasal tumors in the last few years so it's something I can't shake worrying about - especially since breeds with long snouts are at greater risk and Riley is seven now so technically a senior. The vet did mention dental problems as a possible cause of sneezing. Riley needed 8 teeth out the last time he went for a dental cleaning and x-rays so we know he is at risk for dental problems and he does have bad breath lately. Anyway, I was already planning on booking him in for a dental cleaning in a couple months so I will move that up and have his nose scoped then as well to see what is going on. Praying that it's a virus or allergies but I am worried it's something more serious. Has anyone else's sheltie had a similar problem with sudden onset sneezing without discharge and have it turn out to be nothing serious? Also, any experiences with Vanectyl-P? BTW, sorry to not have been active lately; my own health hasn't been so good. Thanks for letting me ramble.