David I think you are right , cats are very sensitive and they will know something is up with you, Geez David I am starting to feel nervous for you over here, just thinking about it, I know in my heart you are going to be just fine, but it is an anxious time for you ahead, and we all feel for you, and wish you the best.
Here is my pic , since it did not work the other way, this should, I have posted it many times before., sorry it is in paint and will take a bit longer to open, for some reason it got saved there.

Take care now.