The flock don't recognise Shaun when he loses one his most distinctive features. His old pal Bitzer helps him track down the lost thatch, but not before Shaun becomes very attached to one of the chickens.
When the farmer gets stuck in the Loo, Bitzer has to get vital supplies to him as a matter of urgency. His initial efforts end in failure and he drafts in Shaun and the gang to help out.