Well, our plans just changed. We left Fall City WA this morning just after we found out that my wife has shingles. The change in plans is that we will spend a few weeks in Blaine WA before resuming our trip to Alaska and we still do not know where we will be going in BC
It was mentioned that your parents are taking their two dogs into BC. Make sure that they have the dogs examined by a vet just before they leave. If they will be entering BC within 30 days have them get a health certificate from the vet. They also need to make sure all vaccinations are up to date and they must keep the shot records with them. We've never had to show the health certificate or shot records but they may ask for them.
They must have a current passport to enter back into the states. From what I understand there are other doc's that are less expensive but I only know about the passport.
As others have told you, they will be fine.
Pat & Roger Fisher
2005 American Tradition 40W
2012 Honda CRV EX-L 2WD,
Jewel, Clifford and Thor - Bouvier Des Flandres