[SWHouston]

On you item #1:
Many Dogs take quite a while to get used to a Harness. You might try letting her wear it around the house more. I've always made any puppy I got wear a Harness just about 24/7 for the first few weeks it's with me, then it's only used when we go out jogging/car/other.

Item #2:
It is VERY important to me for them to alarm/bark, and do for people they see and animals as well. I praise them generously when they notice something important (person or stray dog like that) and really play down the praise, when it's something important. But, I never chastise them for any alarm, just soft petal most.

Item #3:
That's TOTALLY unacceptable ! Nipping at hands or feet just is bad behavior, and I give a puppy a verbal "Growl" at first. If that doesn't get it's attention (make it stop) I reach down and give it a firm pinch on the back of the neck as I growl again. I know that's "corporal", but it does work, and a puppy needs to know what growling means, and the consequences of what it's doing. Neither of my two nip any more ever, and know to back off, when they hear a Growl, from me or a Dog.