"If one commits an act of sodomy with a cow, a ewe, or a camel, their urine and their excrements become impure, and even their milk may no longer be consumed. The animal must then be killed as quickly as possible and burned, and the price of it paid to its owner by him who sodomized it." The Little Green Book II 10
There are eleven other things which are impure according to Islamic doctrine: urine, excrement, sperm, bones, blood, dogs, pigs, non-Muslim men and women (kufr), wine, beer, and the sweat of the excrement-eating camel.
But, allah doesn't turn Muslims into apes or pigs, etc. if they don't keep the sabbath. Allah changed its mind, or the rules, or whatever. Allah has a hard time keeping things straight. Just see how many times he changed his mind about how he created humankind: from clots of blood, from water, from dirt, from potters clay, from stinking mud of various colors brought to him by the Jinni Iblees, from fluid created from the back near the ribs (kidneys, that is urine), from sperm - whose he didn't say, etc.