I have rarely found a baby tooth from any of my dogs - ever. They normally pass through their systems with no problems.
We had bought some different treats for them at C'mas that were homemade and being sold at the vet clinic. The dogs absolutely loved them, but I found one of Tibby's teeth in the bed one night (and she's an adult). The biscuits are so hard that I said no more!
She'll be fine, Mom. Just don't forget about the tooth fairy!
RIP Wallis, John Robert, Tibby & Pip
Mom to JoJo, Roxie & Linguini (Cavaliers)
and my birds Moji (Senegal) and Walter (Blue Front Amazon)