(459) This describes a reddening or blue discoloration of the skin, often transient, and commonly seen during transport. The pigs skin is sensitive to irritants such as urine, sawdust and disinfectants. Generalised discoloration particularly the extremities is seen in toxic conditions, bacterial septicaemias and viraemias and where there are circulatory problems. Occasionally when sows are bedded on urine soaked shavings in farrowing crates their complete body turns blue, the sow appearing quite normal. This is usually of no consequence.