Will Falconer, DVM Moderator
Yes, I've never found that to be an issue, Cindy.
I'd make an exception if there were recent parvo outbreaks (sick dogs with diarrhea on the premises) and a new pup was about to join the household. Then, I'd likely hold off on distemper and give the parvo nosode every week. I think once or twice wouldn't matter much in that case, but I'd probably recommend twice a week until the dog is a good six months old.