When Bucky paused, Steve already suspected he'd found something - someone - he liked. So when he exclaimed a moment later, Steve gave the dog he was petting one last scratch behind the ears and shuffled over to where Buck was petting...

Either a large dog, or a small buffalo. "Holy cow, Bucky," he laughed a little squatting down to read the sign. "I think your mom might kill you." But he didn't sound discouraging. Just... all the more bemused. "I think she'd walk you, not the other way around."