Lhasa puppies are much slower maturing than many other breeds. On average, puppies learn important social skills, such as bite restraint, from playing with their mother and littermates between six and eight weeks old. However, some Lhasas still don’t have teeth at eight weeks and they can’t learn bite restraint until they get their teeth. Depending on how much housetraining and socialization the breeder is doing, Lhasa puppies adjust best to their new homes and families sometime after ten weeks old.