How long does the teething process for puppies take and how can I monitor the situation?

In the puppy bite work class Michael tells us to stop playing tug when they start teething. Today my 17-week-old pup lost a very small baby tooth while we were playing. So, my plan is to stop all rag-and-tug play and work on tracking and obedience. My question is how long will this process be and how can I monitor the situation?

Leerburg's Answer:

Most puppies begin teething around 15 or 16 weeks and have all the new adult teeth in by around 6 months of age. I don't do any tugging until the adult molars are all the way grown in (usually by or around 6 months) The caveat to the teething timeline is very small breeds, I have a 7-month-old toy breed puppy right now and she just started teething about a month ago.

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