Well, I have now solved my issue with the event switching problem.
Thanks for the idea, but herding isn't a game feature unfortuanately.
If you look at the Game images, you have to collect carrots and spikes will pop up after you walk over and off them, blocking your return.
There will be other modes, such as Easter egg mode, but not for the demo.
I might make a Herding mode, perhaps, but it is unlikely as it isn't in the Bobby Carrot mobile games or smartphone apps or iApps.