First, I am very glad you found your dog.

I agree with Carrie, see what your rights are in your state and see
if the scanner was faulty or just
does not scan your particular chip.
They have attorny's that
specialize just in animals.
Hopefully you can get your answers
with your first consultation before
it costs you a arm and a leg.
If you end up in small claims court
gather as much proof as you can.
Such as letters from puppy buyers on your waiting list.
Letter from your bitch's breeder etc. etc.
Please keep us informed of the outcome.