I adopted a dog about a month ago (5 year old female) and she’s very reactive on leash with other dogs and at times people. My partner and I decided to hire a trainer that was recommended by some other dog owners in our building. We did a consultation and one training session so far. He doesn’t use any treats or positive reinforcement. A large part of the training was standing outside waiting for dogs to pass by and when she would react, he would say a verbal command to get her to stop barking, while tugging the leash, and if she didn’t listen he would flick some skin by her back leg (hard enough that twice when he did it she whimpered). Then he put an e collar on and would use the beep feature when she would react to other dogs (in combination with verbal command). I was not comfortable with how the session was going or the training style. Am I right to have cancelled the rest of our sessions? Or could this training actually be helpful to her? I don’t have experience with a reactive dog and I’m worried this type of training would just cause my dog to mask her reactivity behavior without getting to the root of the problem. Also, she used to be okay with people coming into my apartment (would bark at first but settle quickly and allow pets) but since the trainer has been over she seems more weary of strangers in the apartment and now growls and raises her lip. I believe it is because she had a bad experience with the trainer coming in and bossing her around without him establishing a relationship or trust first 

Am I right to have gotten rid of my dog trainer?