Hi
Welcome to YT! It's always nice to have new members here
I am sorry to hear about your childrens allergy problems!
My sister has very bad allergies and has never had a problem with my two yorkies. Most yorkies are "hypoallergenic" so to speak and a lot of people who can't own other types of dogs can own a yorkie because of that. Have you looked into other possible reasons for their allergies? I'd hate for you to have to sell your little girl and then find out she wasn't the problem
Hope everything works out for you!