I wish I could give you some good advice, but I have the exact same problem. My little Bella (3.4lbs) has been doing the same thing once she gets outside or in the car (even when I have the heat set to 85!!!)
. I just bought her two coats yesterday and some sweaters and I'm looking into a quality warm carrier (I'll probably hafter to put a heat pad or a hot water bottle in there with her) because we are going on a trip next week. Bella is also my first little girl (only 6 months). So I am also really intrested in any good advice. I know that I have low iron, so I am supposed to take a vitamin supplement; can yorkies have the same problem?
Jen