I have the half-n-half. Zowie runs for the hills and Bronx insists on jumping and biting at it. He does the same with the LAWNMOWER! He barks and races around it. I have to catch him to put him inside if the yard is to be mowed, which isn't easy because he really wants to get it! At least the vacuum is not so dangerous, I just have to listen to him - he doesn't get so close, but he barks and stays in front of me!