They usually start losing baby teeth between 4 and 6 months of age. Usually they will not all fall out on their own though and will need to be pulled. I think the chewing phase is different for each dog. Lacy doesn't chew on stuff she isn't supposed to anymore, but she still loves to chew on her bully stix and toys.
LOL your baby must be living up to his name
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~Magnifique Yorkies~
Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue.