We recently took a pair of 7 week old littermates from my SIL/BIL who had taken in a feral momma cat who had 4 kittens.

Cute, fuzzy, who love a good snooze on a warm lap, but absolute terrors on paws. They charge up and down the house like a herd of elephants. I don't know HOW a 3 and 4 pound animal can make such a racket! They have destroyed plants, the leather couch is looking increasingly more "distressed" with each passing evening - even as we blast with squirt guns, air dusters, and have sticky-tape all over the house. We can't watch them 24/7 and it's those times when we ... oh, try to sleep, go to work, that they seem to wreak the most havoc. They've gotten better about sleeping on our bed with us (something DH is trying to foster), but by 3:30 a.m., they've woken up, get their "ya-yas" on, and start with the wrestling matches. So, it's out the door they go, into the hallway, and they stay out there and cry for the rest of the evening.

Kittens are darned cute...but they're exhausting. In the future, I'd definitely adopt a more mature animal companion.....