Seems like you shook the camera a little. I don't think it's a particularly bad effect, because battery hens are usually pretty active, and it emphasises that. The exposure is good and the composition is strong, so I think all in all it's an OK photo :).
Not a lot of people have ever seen this. Are they in for a surprise. The photo is great but need just a little sharper focus over all. With better focus you'd add from 3 to 4 points to your score. Great concept.