Allergies are very complicated - not easy to treat. Stuff like Zyrtec almost never works for dogs, btw.
The only 3 meds that really seem to provide relief are prescription and are - Atopica, Apoquel, or steroids. If this itching is year-round, then Atopica or Apoquel are your best bets.
If she has yeast all over still, this
has to be treated. Usually you'd treat systemic chronic yeast w/ Diflucan x 6 weeks, orally (by mouth, via a pill).
Read more about allergies here:
http://www.yorkietalk.com/forums/die...tart-here.html
And read about add'l paw symptoms here:
http://www.yorkietalk.com/forums/die...-diseases.html