Puppies explore the world with their noses and their mouths. So try not to be to rough on the little one. Nipping and jumping ahould be halted asap. WHen your puppy nips at you, you can YIPE in a high pitch voice, mimicking a bit puppy, place your puppy on the floor and give your puppy a chew toy to play with, encourage your pup to play verbally. This teaches your puppy what to chew and what not to chew. Or you can just say NO. Firmly not yelling, not too loud, just a No, again set your puppy down on the floor and give him a chew toy, and encourage him to play with the chew toy. Take your puppy out on some leash walks and try calling the local humane society in order to find a positive reinforcement training class, you might also try and find a dog park with smaller dogs so your dog can get socialized. Good luck

Also, do not reward bad behavior. If the puppy continues to bite after your yelping, turn away from him and do not pet until he behaves appropriately.

At 11 months of age, however, if he's been allowed to bite all this time, it will take lots of training to break him of it. Consistant training is very important and rewarding.

If possible, stop the act of jumping/biting before it starts. That makes training much faster, since you prevent the act instead of addressing the act after it happens.

We just adopted a (we think) whippet/terrier mix( and spayed) who was a jumper/pawer. She also was completely scared of almost everything.

The method I use to raise a scared dogs self esteem is to continually praise the dog for any good---or even average action and pet/scratch under the muzzle/on the chest.

That does, however, increase the tendency to jump/paw. So, we began standing over her when praising(dominant position) and saying DOWN firmly. Initially, we had to actually move her feet to the ground, but within a week, Down was sufficient. Then the praise and pet/scratch when she had all four feet on the floor/ground.

We also have a very Alpha unneutered male guard dog, which we took for the adoption 'interviews'. He accepted her even when she was in terrible fear at the puond. He continues to allow her almost unlimited play with him---even when he gets irritated. I noticed that time is lessening as she gains confidence, however. She does tend to pester him a lot sometimes.

The structure and safety of a normal family and the basic rules to be followed allow a dog to be very confident.