Naw, my cats already know how to get up on the seat and put their head down in the bowl and get a drink with a paw or two down to support them. Now if I could teach them to flush the toilet ... hey, that would give them a little more survival time, until maybe a relative (one of mine of course; both my boys were strays, so their relatives don’t know where they live) called several times and couldn’t get in touch.
Let your mailbox fill up with uncollected mail and they’ll check on you or have the cops do it.