Puppies jump and bite for a number of reasons. Sometimes, they're just excited to see new visitors. Other times, they're just trying to play. Like human babies, puppies aren't born knowing how to act, so they must be taught appropriate behavior. Puppies who grow up around their parents and siblings learn that biting and jumping isn't acceptable. When puppies are taken away from their parents at an early age, however, it's up to their human "parents" to teach them fundamental social skills.
Instructions
Set clear boundaries. You have to teach your puppy what is okay and what isn't. If you don't want them jumping on people, for example, firmly tell them "no" each time they do so. It will help them learn that what they're doing is wrong.
Don't reward bad behavior. Sometimes puppies bite and jump in an effort to get attention or play with their human pals. Therefore, it's very important to not give them what they want. If they jump up on you, don't pet them or let them give you kisses. Firmly place their paws back on the floor and turn away. This conveys the message that when they jump up, they get ignored.
Do reinforce good behavior. After ignoring your puppy, she should eventually sit or lay calmly on the floor. At that point, bend down and praise her by petting and using positive reinforcement. Simply saying "Good girl for sitting!" while you rub her back will work wonders.
Be consistent. Reprimanding your puppy for jumping one minute, only to ignore the next incident will send mixed messages. He may take his chances, choosing to jump and bite, in case this is the time he doesn't get in trouble for it. If you're adamant about nixing the jumping and biting behavior, you must call him on it every time it happens.
Don't confuse your puppy. Letting your young puppy use your hand or sleeve as a chew toy is a big no-no if you don't want a dog that bites as an adult. It's difficult, if not impossible, for puppies to understand when it's okay to bite, such as during playtime with you, and when it's off-limits, like when your two-year-old nephew comes to visit. Likewise, your puppy will be confused if you let her jump on you when you're in your lounge-around clothes, but yell at her when her jumping ruins the freshly-pressed suit you donned for an important job interview. She doesn't know the difference, so you must teach her that biting and jumping are never okay.