Have a teen that has a little too much free time on their hands this summer? Or maybe you’re looking for a fun way to make a few extra bucks in between dropping the kids off at sports practice? Becoming a dog walker is a great option for people of all ages who want to make a little extra cash! However, just because you want to become a dog walker doesn’t mean you’ll become one overnight. There are a few things you’ll need to do before you start walking dogs in the Philadelphia area. Know the Best Places to Go Walking around the neighborhood is for amateurs. If you really want to be successful as a dog walker, you have to know the best places in the city to take your clients’ four-legged friends. Wag Walking recommends the Fairmount Park Historic Houses and the Laurel Hill Cemetery, “Franklin Square is one of the five public squares originally laid out by William Penn, and it has transformed into a gathering space for families.” They recommend taking the dogs for a walk on one of the many paths in the area. Other options include: The Schuylkill River Trail The Constitutional Walking Tour…