Continuity mistake: When the Coyote is curled up like a spring, he is holding a knife in his left hand and a fork in his hand. When he starts chasing the Road Runner, he now has the fork in his left hand and the knife in his right.
Continuity mistake: When Marc Anthony is in tears after fearing his kitten friend has been made into cookies, there are two steps outside the house's front door. In the next shot, there are now three steps.