Interesting game, the concept is great and there's a lot of different approaches to it and effects.
I don't know if I've seen all the possibilities but I think there's very few options allowing you to protect the sheeps from predators. There's the bears but they also kill your sheeps and I did not manage to get more than one.
Maybe I missed something here. My best strategy here was to shake all the predators trying to get close to the sheeps but it's very hard, especially when some predators have the speed boost effect and they move like Flash.
Anyway great entry, good job!