"yorkie poos" and "malti poos" are mutts that she's breeding.
i love these mixes, and would any day take a free one or adopt one.
but i'd never pay for one from a "breeder"
she sounds like a backyard breeder from your description, and her dogs probably aren't registered, health tested, etc.
I would looks at the link Nancy&Gidget posted
You'll gets lots of good info by searching these threads for Breeder examples and info.