Yep, they lose their teeth just like kids!
My first German Shepherd was playing with my little sister when he lost one of his puppy canines. My Mom was horrified to look out and see blood down the arm of my sister's white sweater (she was only 5 years old at the time). Mom just knew that my puppy had bitten my sister and ran out into the back yard to keep her baby from being gruesomely mauled by a rogue puppy. She was puzzled when she couldn't find a mark on the child; then saw the tooth gap and blood on the puppy's mouth. She felt awful for thinking he'd done something wrong and made a HUGE fuss over him and never doubted him again.