Very nice :) The only critique I would have, is that it'd be nice to have it capture the feel of the comic a bit more. You don't exactly need to express so much through dialogue, that's the job of the artwork. After all, this is sequential art right? For example, you express that the sheep stumbles back in surprise, but then you write it as well. It's just sort of redundant in my opinion, and nags at the flow of the whole piece.

Otherwise, really well done, and I love your art :) Great job.