Abu Dawud Book 1, Hadith Number 186.
Chapter : Performing ablution is not necessay after touching a carcase.
Narated By Jabir : The Messenger of Allah (PBUH) passed by the market when on his return from one of the villages of ‘Aliyah. People accompanied him from both sides. On the way he found a dead kid with both its ears joined together. He caught hold of it by its ear. He then said: Which of you likes to take it? The narrator transmitted the tradition in full.