When lottie was losing her baby teeth she didnt have any problems with chewing with her new teeth, and didnt seem in any pain at all, tho it kinda freaked me out to find her little baby teeth around my flat! didnt kno what they were and posted here to find out!
I kno that one of the problems in yorkies is their teeth cos they have such small mouths.
id have the vet check her out just incase she has an infection in her teeth or gums or maybe has too many teeth crowding her mouth? anyway the vet will be able to tell you if there is a problem
hope this is some help