There's a new "Bark Park" at the Pennsbury Township complex on Route 1 (702 Baltimore Pike) in Chadds Ford. According to the park's Facebook page:
"The Bark Park has two sections, one dedicated to large dogs and one dedicated to small dogs. Both areas have shade trees, benches and incredible scenery of Pennsbury Township. Please bring your own water for your dogs!
"Meet up times are posted at the Bark Park to help encourage people (if they can) to show up at the same time, since the park is so new. The Meet Up times are Saturdays at 9:00 am and Sundays at 10:00 am.
Otherwise the Park is open from dawn to dusk everyday, except Mondays."