We were discussing "what to do" when pet owners frequently describe the presenting complaint they want fixed as "Dog jumps on people," or "Dog barks in the yard all the time," or other things they do not want the dog to do. They've asked us to teach the dog so it will know all the "Do not do this" behaviors.

In other words, "Please wave a magic want so my dog will not jump on the kitchen counters anymore." As if to hint, "Otherwise, he's perfect." It's far, far simpler to teach a dog what you *DO* want it to do, instead.

"Does anyone have any good suggestions for leash biting in a puppy?"

Yes, I would suggest two possible approaches, perhaps depending upon the age of the pup. One is to build a small repertoire of alternate desirable behaviors, click/treat the pup for those. Then gradually add those to the daily pattern when taking a walk on leash.