Hmm, rescue dog, new surroundings and your friend picks up the dog turns it on it's back and goes for it's throat?
THAT is exactly how the dog looked at when your friend flipped her over and then went to pull on the collar around the dogs neck. No wonder the dog bit her!
If this dog was really raised with kids give this dog TIME to get used to being ripped from it's owners and all he has ever known and placed into a new strange home with strange people.
I don't let anyone outside my home touch, pick up or do anything to a new rescue dog I have added. Let him get used to your family and start feeling secure that this new place is not going to hurt her and that you are there to protect her, BEFORE you start exposing her to yet other strangers.
Just saying. I see more dogs returned not because of the dog's fault but because most owners do not take the necessary time to introduce a rescue dog to it's new home. Bottom line IMHO, JMHO not knowing 'all' the exact circumstances. I don't think this dog is a biter.
Back any dog in a corner with a baseball bat and they will all try and bite you to save themselves. This poor little pup was on her back and big human going for her throat, give they little pup a break!!:B:B
Maggie is about 18 months old and appears to be mostly Shih Tzu looking with some terrier mixed in
Pictures, we need pictures! Post of picture of the new rescue she sounds way too cute to ever be bad! :C