My love goes out to you Sir Warwick Rule, a one-man animation army. Despite the minimalism, the design of the sheep was great and you do a lot with eye movements (and colour) to inject character where it's needed. I do wonder if you're able to add a few more touches to the background to really boost the overall look, just some texture on the mountains or the grass and add a few clouds or something. This may not be physically possible, of course - there's only so many minutes and cans of V one is provided.
Out of all the gags, the sudden sheep sheering at the end was my favourite. It's probably because it's so immediate, which made me realise that the second half of the short (after they jump the fence) could have cut quicker to the chase in order to add more urgency to the angry bull situation. The gag about Charlie being distracted by a butterfly doesn't quite work - probably because we don't actually get to see it. It was also a bit jarring to have the chilled out music still playing when the bull first charges.
Nevertheless, this is a cool addition to the 48Hours animation section.
(Actually, I lie - "weed..ses" was my favourite gag.)