Sifting their litter box every day takes care of that problem, but I'm not sure what you mean by "sporadic behavior." If you mean their odd, unpredictable nature, that is actually the fun of cats. You never know what they'll do next, especially if you have more than one. Having multiple cats brings out their personalities better.

I grew up with cats, and my memories of them were basically just like that. I lived in apartments for 20+ years as an adult, and rabbits were my pet of choice for most of them. Basically the enthusiasm of a dog when I came home, but less stinky litterboxes (mine were trained).

A few years after the last one passed away, I got a dog. Then a house, and a second dog. And two and a half years ago, a good friend needed to go into assisted living, so I took her cats. Internally, I wasn't thrilled, but if I can keep animals out of the shelter, I'll do it.

There was a period of separation in the house, with cats in the attic, but a few months in, everyone started to mingle. And I love these cats. The litter box situation is still evolving (I think I'm getting the robot), but they're pretty chill. I've had to intervene a time or two before the pups get a taste of the murder mittens, but both dogs and a cat are snoozing on my bed, and most nights, all 4 of them sleep with me.

I don't know that I'd get another cat when these two go to live with their mom at the rainbow bridge, but I want them to have as long and happy a life as possible until then.