[KazzyK810]

I feel like the breeder manipulated you by asking you to watch the puppy while she's gone. You returned this puppy for a reason.

I would walk away. You are entitled to a healthy puppy.

I know how hard it is, when you've suffered the loss of a dearly loved dog, and finally come around to opening your heart to another. I went three years without a dog after my Chelsea died, convinced I could never love another dog as I did her. To finally get to that place where you are open to another furry friend and experience the difficulties you have with this puppy, is heartbreaking. But in your best interest, I would make the break, walk away and look elsewhere.