Good advice above. You may find blood on various things too. That's a sign that they just lost a tooth. When Jack my non bully was at Petco last year for puppy play groups, one of the other pups there lost a tooth while the two were playing. Well Jack is nearly all white and he looked like he'd been in a fighting ring. I had them get my a rag so I could wash him down he was that red. I was lucky to have caught 5-6 teeth between Wilson and Jack. I saved them too.
Three Hooligans and 1 Angel - Wilson, Sally, Emma & Jack
I'm having toofie envy. I never saw any of my dogs baby teeth.
Wilson & BabyGirl