White shepherd

Tonight, Fozzie brought home a boyfriend. This dog is now in my yard with Fozzie, humping and playing and rolling around, both of them having a blast. Where did he come from? Whose is he? I don't know, and I think its a long time since he's seen them--this dog is skin and bones. Scared to come near me but came close enough to eat the hot dog I tossed his way, before backing off again.