Completely hypothetical

So, imagine that you have two 12-year-old cats, who are friendly but generally prefer a good loll on the couch to any sort of string-chasing-type action. And then imagine that you add to the household a 3-month-old kitten, who almost never holds still, pouncing on any piece of lint or moving object of whatever size, and crawling in, behind, or over anything in the environment. You could be forgiven, I think, for suspecting that these are members of completely different species. You might also reasonably speculate that, even if the latter settles down after a year, they may continue to be more different than alike.

So then you might find yourself musing about whether four cats was indeed a completely ludicrous number that would automatically qualify your household as Crazy Cat People. Or whether it might be best for all concerned that you consider a youthful playmate for the current kitten, say, um, something along these lines... Just hypothetically speaking, of course.