The second class started putting different search elements and moving the learned behavior outside. I found that I was having trouble remembering to keep things simple. The goal at this point, and like any new behavior, is to keep reinforcements high and encourage drive. I kept wanting to make the scent harder to find to really see her work and have fun finding it. Keep it simple and fun!
This is something we say all the time in foundation agility courses, Simple and Fun. I don't know how many times I've had to remind students to keep the reinforcements high, especially when adding a new distraction. Interesting that I'm having the same exactly problem when I start something new. Its just so fun! :)