The ferret has complete short circuits in its brain that leap from stimulus to excitement.

The cat can show similar traits (eg. catch sight of a mouse, except when it's indoors and you would like it to help) but is generally more considered in its approach (although some may say this consideration includes manipulation of us poor humans).

Both (and dogs and other animals - at least sticking with the domestic ones - can't go along with people trying "exotic pets" like monkeys) can be the right pet for someone. Maybe the trick is getting that partnership even if it is being "owned" by a cat.

Still, if it's the hunting pairing you want I don't see a cat as the answer. Some can be inclined to bring the odd (live or dead) present in but their offerings if they do that are unwelcome to most people.

cats suit me best these days but a younger and fitter version in the right environment could also go for another dog. At one time, I fancied the idea of a Springer spaniel but I believe they, again, can be a bit loopy in their own way and need a lot of work...