 Betsy Hallett runs the Central Aroostook Humane Society in Presque Isle. She says the new rules will make it more difficult to rescue some dogs, facilitate adoptions, or return lost pets to their owners who cross Maine's eastern border with Canada. So what has happened in the past is people end up in the gym of not having proof of vaccinations, so therefore they can't cross the border, pick their dog up, and take it back home with them.