In this Part castration , of a sheep, includes any procedure performed on the sheep to temporarily, or permanently, sterilise the sheep;mulesing , in relation to a sheep, means the removal of skin from the breech, or tail, of the sheep using mulesing shears;mulesing shears means a set of shears with sharp blades, that have rounded points, that are specifically designed for mulesing a sheep;skin , of a sheep, includes the wool follicles of the sheep but does not include sub-dermal tissue;tail docking , in respect of a sheep, means the removal of any part of the tail of the sheep other than wool.