Dragonchilde,

This isn't really your question, but, I am curious...why do the cats have to be locked up all night (and yes, I know some PT do it...but...)? Don't you let them have the run of the place during the day? Wouldn't they exhibit the same tendencies to "tear up the whole house from boredom" whether it is day or night? I think maybe they are bored/displeased from the confinement....