The pig is unclean to you because its hoof is divided (the hoof is completely split in two ¹ ), even though it does not chew the cud. ² 

and tear it open by its wings without dividing it into two parts. ¹  Finally, the priest must offer it up in smoke on the altar on the wood which is in the fire – it is a burnt offering, a gift of a soothing aroma to the Lord.

“‘All ¹  animals that divide the hoof but it is not completely split in two ²  and do not chew the cud ³  are unclean to you; anyone who touches them becomes unclean. ⁴