Took 3 Chihuahuas in for training a couple years ago. Got somewhat of a discount for having all 3 in there, which was great. But, I think they received less training each because of it. Thought there would be specific, custom services performed, as we wanted them to be pad-trained. One of them already was. However, the other two - never have been, even after. One dog's aggression was much better, that I can say. My wife was appalled through the one-way window when she saw the trainer tossing our smallest, 4-lb Chi around with the leash to get her to obey. Since then, we called several times to talk about coming back for either a refund or re-do. Never could connect and the idea dwindled. I now have only one of them and will be trying out Bark Busters to stop the remainder of the aggression and housetraining. Fairly disappointed in the whole process.