Boston Phoenix and Boston Magazine both agree that the off-leash adventures led by Doggie Daytrippers are an upgrade from leaving pups at home. The rationale behind the unique form of doggy daycare? A tired dog is a happy dog. Tiring activities look a bit different for each dog, which is why doggy field trips involve swimming and snowshoeing at local parks and beaches, whereas daycare includes hours of open play at each pooch's pace. Dogs can also pal around with new friends if owners sign them up for a city hike, which means two hours at a nearby dog park, including pickup and drop off at home.