i had a border collie for years, and second best dog ive seen, and best ive seen at herding everything from field mice, chickens, and even other stray dogs/cats, to horses and cattle. i now have a rough collie pup, who is alot calmer and not an incessant workaholic completely yet, but will still stare down even a pit bull, livestock, or even people who he perceives to threaten the neighborhood children, or my livestock. on the flip side, id get alot of tough and enticing chew toys like nylabone versions and stuff, as i had toys designed for pitbulls i had for years, they didnt destroy most, or even touch some, but wen had that border collie pup she tore through them like butter in hours to days at most, till put her in herding training. started with chickens , as she instinctively would round up neighbor's newly bought large herd of sheep that were getting out everyday and wandering all over, and he was upset my dog would herd them into the pen and hold them till someone closed them in. he had one of those huge mean (supposedly), Pyrenees to guard sheep, but it would run off or just get herded up right with the sheep.
so yes they definately need something to do, or they will eat through your wall and dig up and under everyhting, definately not a non go getter family pet. they also are a bit nippie, but not like most herders, but mine never mouthed children, just stubborn horses and cattle, and never left marks, just would mostly show and snap jaws together to get the loud point across, as intruders found out a couple times. though she could have attacked them and showed no fear and seriousness, she never bit. if allowed to be taught to patrol, chew, fetch, herd, or do tracking/scent work, they are the best cuddler/snugglers, just will start back up as soon as someone moves, only wanting to eat (though seen some emotionally/mentally stunted ones eat as much as any other chow hound or more out of boredom) drink or rest, when everything is completely calm. i like to teach my dogs not to bark from when first get them if young, as it just solves so many problems, unless allowed and taught/encouraged to bark only when herding and guarding.
good luck, they are very worthwhile dogs, and even the word collie means "usefull", and they will teach you alot and what you need to work on and get active in if needed more.