The only time Pickle has coughed it turned out to be kennel cough. I didn't realise how virilant it was. It was a nightmare because he had to be kept in for weeks. He wasn't that sick with it but we were told 10 weeks He wasn't a happy puppy. Anyway this year he has had the drops up the nose for kennel cough as it was required when we went away and he was in kennels. We haven't had it since touch wood. It can actually be very serious and we were lucky he only had a mild case of it.