The solution to jumping and mouthing behavior is to withdraw your attention completely the ''instant'' your dog starts to rear up. Stand up, cross your arms, and turn your back on the dog. If he comes around your side and tries to jump on you again, turn again. You might have to spin in slow-motion circles, but keep your back turned on the dog, don't make eye contact, and keep your arms folded (this prevents your hands from being a target -- many dogs will nip at your hands in an effort to get your attention, and that in and of itself can be enough fun to keep them going). Ignore him utterly.

The solution to jumping and mouthing behavior is to withdraw your attention completely the ''instant'' your dog starts to rear up. Stand up, cross your arms, and turn your back on the dog. If he comes around your side and tries to jump on you again, turn again. You might have to spin in slow-motion circles, but keep your back turned on the dog, don't make eye contact, and keep your arms folded (this prevents your hands from being a target -- many dogs will nip at your hands in an effort to get your attention, and that in and of itself can be enough fun to keep them going). Ignore him utterly.