I had been working really hard on Milly's training, and was very consistent, but with the elections I didn't have as much time, and in my free time really worked on doing physical things like hikes (a lot off leash) with Milly, and our walks tended to be shorter, and we'd go to fields to play in the evenings. So, now, six weeks later, I went on a walk with her around the neighborhood (actually, went on a car trip to a new neighborhood to walk with one of my good friends), so it was more exciting being in a new place and noticed a lot of the walking nicely on a leash work I'd done all summer had disappeared over the past 6 weeks. I have still worked on other obedience things over these 6 weeks, but I was amazed at what she retained, and new things she didn't do before she is doing now. She did retain walk on a loose leash, thank goodness. She did develop a new habit of leaping straight in the air, rearing on her hind legs, and barking when a particularly fun squirrel runs across the path. Obviously, I'm less than thrilled with this new behavior. When she did it the first time I pulled on the leash and said, "Let's go" and started jogging to get her moving forward. When she did it again I gave a firm pop on the collar and said "No jump!". What should I be doing differently? How can I correct this behavior? She only does this with squirrels, and will get more attentive and a little excited, but nothing like this around dogs. After three corrections she quit doing the leap in the air, rear on her hind legs thing, and would just stop in her tracks when she spotted a squirrel (the barking had stopped too). I feel like this is on the right track, but I want her to maintain the forward motion of walking. Any thoughts?