What I meant by 'have to take good care of them or they're a pain':
Mine loved to chew cables and wires so we had to keep a close eye on them or they'd break electronics.(they'd never get zapped
though, but I bet it could happen if you had the wrong kind of wires)
also, if you don't have enough time to let them out and play with them they'll become mischivous and cause problems.