Hear, O regenerate Rishi, What I say to you about your duty. The wise say that a dog is impurer than a jackal. The haunch, again, of a dog is impurer then any other part of his body.
शृगालादधमं श्वानं प्रवदन्ति मनीषिणः। तस्याप्यधम उद्देशः शरीरस्य श्वजाघनी॥