Just took a look at her site, and I would tell you to trust your gut and keep looking.
Her health guarantee alone runs contrary to State law in Delaware.
"If you decide to keep the Yorkie, we will be released of the responsibility of replacing, treating or refunding the purchase price of the Yorkie"
(3) Retain the animal and receive reimbursement for reasonable veterinary fees for diagnosis and treatment in an amount not to exceed the original purchase price of the animal.
Delaware Puppy Lemon Law-Puppy Lemon Law - You and Your Puppy Have Rights!