merrill the pit bull refuses to leave shelter without taco, the chihuahua he protects nadia January 24, 2018 chihuahua videos merrill is a friendly three-year-old pit bull and his little buddy taco is an 8-year-old chihuahua. they lived together at rocket dog rescue. what will happen when a new owner wants to adopt merrill? Follow Famous Chihuahua on Istagram share this on social media!