Hi and a big welcome to you and Baby
!
Unfortunately, you're dealing w/ a 'skin issue' - and those can prove quite mysterious and complex. They can take time, effort, and money to figure out. Remember that the skin is THE largest organ in the entire body so when it's all activated like this - there is definitely something going wrong.
ALL skin issues are either from allergies, or, secondary to some other disease (ie Hypothyroid, Cushings, Mange, fleas etc...). If you're truly seeing fur loss, then really you do need to have blood work done and test for thyroid issues. You should also think about whether you need to have Cushings ruled out (one of the few diseases that actually causes fur/hair loss) by assessing whether or not Baby has other Cushingoid symptoms present. If she does have other Cushingoid symptoms present...then I'd pursue the next step which would be the Cortisol-Creatinine Ratio Urine Test.
Now, if she was loose for a long time...which seems possible - you may need to revisit the mange issue. In cases of protracted mange - the mange bugs actually BURROW underneath the skin's surface and in those cases the ONLY way to diagnose mange is to do a skin biopsy from multiple areas of the body.
Lastly, this could be allergies - seasonal, pollens, grass, dust, food, etcetera. Read more about allergies here:
http://www.yorkietalk.com/forums/die...tart-here.html
Best of luck and keep us posted on this kiddo!