My Aunts dog loves em we thought it was hilarious that he went so frantic with them. He knew where his was and as soon as my cousin would go over by the wall where it was placed he would jump up and spin/bark ect. I actually done it with Chloe, but she just looked at me like I was crazy and went on her merry way
I didnt know it could be "addicting" for them though... scary. Now I'm glad she didn't like it.