The way most dogs correct each other is by a growl, bark, or showing teeth. Some dogs will nip too. When Reece first met Lolly, he kept trying to get in her face and play bow. This made her nervous so she'd growl a little and show some teeth. This alerted Reece to back off. He's very perceptive and learns fast when a dog doesn't want to play. He doesn't understand why any dog or human would ever not want to play with him though. After he figured Lolly didn't want to play, he went to all the humans in the room looking for some sympathy. They're both such silly dogs