I agree with this post. Sounds like your pup has a full life of enrichment, exercise, and mental stimulation, so that she isn't bored and into trouble. Sounds like she is also super smart and eager to please. How wonderful!Awwww sounds like you are doing brilliantly and I suspect a large part of the reason if your other youngster for her to play with so no need to be biting humans to try and get them to play.
Things might get slightly more challenging when she hits teenage or she may carry on being as fabulous.