After Mira finished eating the entire polar bear, her size and strength were now equivalent to a large dog or a medium-sized wolf. However, she felt like she was approaching the limits of her species and bloodline.
Her instincts as a beast were telling her that she would only be able to kill and consume a few more polar bears before she reached her body's maximum potential.
So, that's exactly what Mira did. She didn't want to begin thinking about how to evolve before she reached her maximum potential.
Over the next week, Mira was able to kill and consume four more polar bears using a similar strategy that she used to kill the first one.
Her size and strength have also grown considerably. Now, she's about the size of a large wolf, which is absolutely massive for an Arctic Fox.