As a child my favourite wild "pet" was snails. I just loved 'em. I never kept them securely enough that they couldn't escape if needs be....and of course they always snuk out of their super duper "des res" as fast as their little foot could carry them. Looking back, this to me is a perfect pocket example of the calling of the wild. Even something as basic as a snail needed to wander of it's own accord and be free (no matter how delightful my child-mind thought it's new home was, lol!
)