I've used all kinds of dog walking/sitting services in Philly, and Britt and Muttropolitan are, flat out and hands down, THE BEST pet sitting service in the city. They are incredibly flexible, responsive, and pretty much tailor to whatever you need. Last minute requests, last minute cancellations, are all handled with warmth, love and respect. They treat my boy Sunny like he's a prince. I almost don't want to write this because I don't want them to get too busy!