I enjoyed the path-drawing strategy for the wolves to surprise the sheep. It's pretty tricky trying to catch the sheep though. Sometimes the wolves would get stuck trying to turn when the path is right near a bush.
For later fixes, what if you set the colliders for the wolf to ignore the bushes (have them be on a different layer that doesn't collide with the bushes, set up the collision matrix in the physics settings). The path drawing can still be limited to non-bush tiles.
Anyway, congrats on making the game!