The fox was running through the forest as fast as he could. If the hounds catch up with him, he would wind up just another pelt on a hunter's wall. However, the fox was getting tired from all that running and needed to get some water quickly.
To his great luck, he found a stream. The fox would drink for a few seconds and get right back to losing the hounds. As he drank from it though, he started to feel unusual. He ignored it and went back to running.
However, as he was speeding across the forest, he found that everything looked smaller. That was when he realized that he was running on his hind legs. He stopped at the stream to look at himself. He found that his body could support two legs now. He looked at his forepaws and saw that they were hands. He still has his claws and pads though. In fact, most of his animalistic features like his tail, fur, and head were fully intact. But it was clear that he had become humanoid. His mind had expanded too. The word for his new form he realized was an Anthro.
That was when he heard something coming his direction. If it was the hounds, he knew how to deal with them now. He hid behind a tree and waited. Then came in full view...