I also have a shih tzu but he was very different as a puppy last time. Anyway, I think your puppy still views the breeder as the alpha dog and you as a lower rank so he likes to take advantage by chewing, messing around and making you mad. Pups don't know what is right or wrong so they will continue to make a mess with things.

To stop him biting your hands and carpet and slippers, I suggest you buy a dog repellent spray. It really works! Or you can make your own solution which is pepper and lemon water, not very good but it works. Dogs hate sour and bitter taste, they hate pepper. I normally sprinkle some pepper on the things he would bite and now my dog knows what he cannot bite.

As for barking, where to you keep your dog? Normally it'll be very lonely so it needs something or someone to be near him. My dogs all sleep in our rooms at night when they were puppies, once they are older, they sleep outside. My shih tzu still sleeps with me in my room but on his own pillow and on the floor.

Training, I would use a newspaper to sometimes gently whack my dogs to make them understand. What I do is when it is naughty, whack the dog's butt softly, don't be too hard or it will be painful, just whack like you are urging him to stop, sort of like distract him. Always say NO. If the pup still never listen, separate him from his toys and game and put him in a cage as punishment for 1/2 hour. If he barks, ignore him. In time, he will learn that once he is naughty, he will be caged and will learn his lesson. After your pup has associated the newspaper with the word NO, then you don't need the newspaper anymore.

This is how I train my dogs. I don't need to use the newspaper on them now coz they understand what is right and wrong. I use the newspaper on me. I just hit the newspaper on my leg or on the floor to make a loud bang and they know that they are wrong. The tip is always let your dog know you are the boss.

Also, does your dog like food? If he does, then another tip is using food to make him know he is a good boy. If he acts good, say GOOD BOY and give him a treat. If he is bad, say NO and punish him with caging in a corner, like we humans do to our own children sometimes. Dogs have the mind of a 3 year old can each puppy has it's own unique way of learning.

zoey used to love biting especially our hands. So I did wat I read in an article last time. I put some coins in a plastic bottle. Each time she bites,i shook the bottle. She stopped because she did not like the noice. Also, I noticed that zoey stopstrying to bite my hands uf i lay them flat on the ground.

Zoey outgrown her habit of biting within a short period of time.Good Luck!