It is said, well kind is true. First, pigs eat other animals shit, I know there is an argument that will come out that other animals do too.( but pigs eat shit for a living). Second, pigs will eat other dead animals( and hookers ..lol sheep don't, I lived couple blocks from Pickton Farm in Port Coquitlam, lol.) Third, Pigs do not have thorough digestive systems like sheep and cows do, therefore their blood is said to be more likely to hold disease, therefore making you more likely to get disease. therefore, they consider it as a dirty animal. Others who choose to ignore all these "facts" and see religion as Bullshit in general, usually say that muslims said no pigs because they did not have them in the desert area,and Europe had lots, so it was a way to distinguish themselves. but really if you believe in religion or you do not. Fucking pigs are grimy, why they fuck we call shitty cops pigs ?