Dittos! When all of my furkids were outside cats, all I had to do was open a can (whether cat food or something else) and they all came running in, and some of them were up to 75 ft away!, to make sure that I was going to feed them their evening meal - canned , mixed with dry food. It doesn't make any difference how purposely quiet I am in opening any can of something, they all hear it. Amazing!

.....................wayne