Be patient, seems most of us go through this with Yorkie puppies. Pepper's 7 months old and was neutered almost 3 weeks ago, maybe it's because of the neuter or it was just his time to calm don a little but I definitely see a diference between now and 1-2 months ago... He lays down and chills more often, or comes and cuddles (OMG my dog cuddles??)LOL. Still, has moments when runs around and jumps up and nips but they don't happen as often as they used to (or maybe I GOT USED to them?
). They do calm down, good luck