(BOYNTON BEACH, FLORIDA, USA)
What does it mean when she keeps chewing her feet?
Is this something that your yorkie has just started?
It sounds like some sort of allergy. Has there been any change in the food you give her or possibly in any of the cleaning products you use around the house?
If it is allergies I would suggest asking a vet as she might need some medication or they might give you some advice on the foods you should feed her.