The dogs from Lancaster park do not go to the pound. They go to the Humane society, where they are well taken care of and eventually if no one claims them, they may find a new home. The least you can do at this point is take it to a vet and have them check for a microchip or a tattoo. I would be pretty heart broken if someone just kept my dog when it ran away, because it's a nice dog. But if you do keep the dog, please make sure it is spayed or neutered, licensed and has all its shots.