I have been doing the off command as a dog trainer told me since he was small and kneed him in the chest all to no avail. I have put him on his leash with choke collar and he is still tugging away. I use the sit command and eventually he calms down enough but that initial greeting is a horror story ...
Often, the reality is that many pups purchased on impulse wind up in shelters or banned to a chain in the garden because they didn't measure up to the dream. This is written to help you consider the answers to the questions you should ask before buying that cute little puppy.