On Amazonâs neverending quest to dominate every single retail category imaginable, the company has settled on its next frontier. According to Bloomberg, Amazon is getting into the pet business and is starting with its own line of dog food. The pet-centric branch of Amazonâs private-label product line will be called Wag, the last remnants of Wag.com, which Amazon acquired when it bought out Quidsi in 2011. Wag.com now redirects to the landing page for Amazonâs Wag brand of products.