My husband wants me to ask why Jetta seems to respond better to him than to me. For instance, When he tells her to come, she comes to him like 95% of the time. When I tell her to come, she comes, like 50% of the time. When we tell her to sit, she sits like 99% of the time, both of us...the only problems is with come with me. what can I do to make her come to me better?