Looking for the ultimate pet-friendly hotel in the US? You're not alone. According to a recent study by Travel Industry Association of America, 29 million dogs travel with their parents each year. And with Americans spending almost $40 billion yearly on their pets, hotels have rolled out the welcome mat. The Fall issue of Fido Friendly Magazine's got it covered, with the top ten list of exclusive resorts eager-to-please their pet clientele, including the AAA five-diamond Rittenhouse Hotel in Philly, where pets are pampered with specialized meals, always-fresh gourmet biscuits, walks from the bellman, and a take-home CD with calming music.