I have a 8 month old mini goldendoodle. She knows all of her commands very well but only wants to do them for treats. I wanted to start layering in low level ecollar training to reinforce the commands. I also want to train her to have a good recall and to hold heal off leash. Is this a good idea? I tried it with a trainer when she was 6 months old but she seemed sensitive to the ecollar so I stopped after the first session. I am have a Eisenstein Mini Educator 300.