I had a foxface that used to sleep by my old maxi 1200's, and after switchinig to tunze he kept sleeping there, and after a few times of thaqt and he learned that sleeping close to them equaled eventual death. I peeled him off them 3 days in a row, and then the 4th he didn't survive. He was fine after the first 2 times, but then he started to get too beat up from it.