...but they do have them for dogs.
Anyway, your vet should be concidering removing the known puppy teeth now. If he waits until 10 months, the teeth will already have shifted to accomodate the disiduous teeth. The teeth could always float but...here's the problem that many vets face w/ these small breeds. When it comes time to go in and remove baby teeth, it's sometime difficult for the vet to decide which teeth are adult and which are baby. Some dogs it really is hard to tell. So, many will opt to wait until their older to be sure. If they accidentally remove an adult tooth, well, the odds of their being another coming in behind it are slim...so now the dog is out a tooth. And we ALL agree that our little ones can use all the healthy teeth they can get!
So, either way, I wouldn't panic, I'd just ask if he feels comfortable removing the disiduous teeth now-assuming the adult teeth are coming in or are already in fully. He/She can always take an x-ray and see which teeth are even developed underneath the gum line to be certain! (an uncommon practice-my understanding)