I'm glad to hear that, but this is not my game, www.
During the Sheep taming, you have to keep her pleasure bar slightly filled (interact with her if you notice that the pink bar it's depleting) you have to do that during the taming to avoid failing. Also, the far you are from the sheep, the faster she will crawl
PD: check the Dev blog nymphokyun.net from time to time, sometimes news appears there