[Amazing Yorkies]

I would say she is uncomfortable or scared. My dogs act the same way when my Mom brings her small dog to "play". At times he will just go off the deep end and attack my dogs. Boy, do they remember it the next time my Mom comes. Just recently I asked her to leave her dog at home since it stressed my dogs so much and never really knew when he would take after them, and they knew it. They walked on pins and needles around him. Maybe something happens that you are unaware of when they were getting along that 10 or 15 minutes.