Sophie had a super awareness of everything going on in her new world. She would skitter about and sometimes bark when something larger than her, like the vacuum would come out. If something dropped to the floor she would run first and investigate later. Yorkies are such small little creatures that anything large or noisy in our "big" world is bound to intimidate them until they know it won't harm them. It's something Sophie outgrew when she was close to two years old. Now she is quite bold for her size
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