Kit-Quat already lost his baby teef! Puppies also have deciduous teeth, which are also called baby teeth or milk teeth. Puppies begin to lose their baby teeth as they turn 4 months old. Most of their permanent teeth, which are 42 in all, are already in place by the time they turn 6 months old. A few weeks ago, I was able to get a photo of Kit-Quat's baby canine tooth beside the newly-grown permanent canine tooth. Today, I noticed that he'd already lost his baby canine tooth. I guess puppies are like babies in the sense that they like to chew on things because they are teething. I've read that the most intense chewing phase occurs while a pup is teething. Still, mature dogs might still like to chew on things from time to time. I give my dogs chew toys so that they won't munch on furniture, wires, and such. I prefer organic materials, like boxes and twigs. They also have stuffed toys, but I make sure that these aren't the ones with plastic or button eyes because these could be swallowed and might cause an obstruction. I also give them empty water or soda bottles to chew on or to play fetch with.