Cook for 6 to 8 hours on high, this will depend on how hot your crock pot cooks. When the meat starts to break apart it is done.
To serve place the meat on your favorite tortilla and then add cheese, lettuce, tomatoes, salsa etc.... or what ever you may like on your Fajitas.
1 - small can of chipotle peppers
1 - small can of green chili's
Garlic salt to taste
Black Pepper to taste
2 bottles - KC Masterpiece Fajita Marinade