Dans parents dog has been staying at our house for a few days. He's an energetic, happy-go-lucky kind of guy - except when it comes to other dogs. He tends to go berserk when he sees another dog on a leash. Maybe the leash is the key to his behavior.
These are some phone shots of him playing with my neighbors dogs. Molly (the blur on the left) is a few months old Chihuahua mix and Uno an elderly Pomeranian. They are never on leashes and ran up before Finnegan or I knew what was happening. They played together all the way around the block, two evening in a row. Go figure!