The bells are hung on a interior door that leads through the utility room to the back door. This way the bells do not ring every time the back door is opened confusing Duke. I think I may try the "Tell Bell" next - it seems that he is scared of the jingle bells or the ribbon swaying on the door. I think it could be the bells since he has a rubber ball that has a jingle bell inside that he ignores also. I really like the Tell Bell concept. Duke is tiny and having the bell on the floor would be much easier to reach. Thanks for your input, hopefully he likes it.
~Jessica & Lil Duke