The following trainers use force, shock, startle and pain to train your dog. They may or may not misrepresent their methods to you when you call, and instead offer a free consult, and say that they would never use anything that hurts your dog: 

Sit Means Sit (franchise)

Bark Busters (franchise)
 
Dog Wizard of Fort Collins (or anywhere, as this is a franchise) 

Colorado Dog Training Academy

Black Paw in Louisville/Superior