My pup had his last week at 11 weeks old and went into anaphylactic shock about half an hour after being injected. His face swelled up, he had difficulty breathing, and he became covered in welts. I had to rush him back into the vet for antihistamine shots.
I don't think age makes much of a difference, I would just arrange to observe your pup for a few hours after he gets the vaccination so you can make sure he isn't allergic. I'm really glad I took a half day off work to watch Ollie, otherwise I might not have a dog still...
I would get the shot done soon though, in case the dog has to be boarded for some reason. Most places that board will not accept a dog without proof of vaccinations. |