We are thinking of visiting my bf's family in WI in February. Last time we went, we drove through the US to get there. This time, my bf wants to drive through Canada. I want to bring Aspen. Any idea of what I'll need to get her through Canada and back into the US? She's up to date on every vaccine that I know of (even ones that aren't required where I live) and she's registered with my town, not sure of any of that matters.