Long suffering dogs they were too absent with their diverted salivary glands and endless bells ringing: The bells! The Bells! The salivary gland diversion! The salivary gland diversion! That chap in Notre Dame didn't know he was born!
Can't you get a bowl of Pedigree Chum round here without some chap ringing bells and collecting me' saliva. Woof.
My guess is that Shrodinger did not have a cat and thought that one would behave nicely inside a dark box while philosophers endlessly debated its hypothetical, or real, existence. And the meaning of existence. He had a dog and knew it would be trying to fight its way out before the lid was shut.
Never did really get philosophy myself.
If he had a hypothetical hamster being quiet in the box it might be more realistic. 