I re assure you she will NOT put Ivy to sleep as long as he is in no pain.
Why would a breeder do that anyways?

Maybe you can talk to your vet, the one who is a friend of the family. Ask if you can work out a payment plan to cover the bills for Ivy's testing and treatment. I'm certain he would be open to the idea...couldn't hurt to ask.
I couldn't do that anyways they can't do anything for him at that vet. He needs to see a specialist he said. So he would have no control over it.