What this bunny would miss most is roaming free. If someone was to let him or her go most likely this bunny would run into a garden and eat away.
What this lion would miss most is eating whatever he wants. If someone would be to let this lion go most likely if this lion had kids it would try to find them.
What this eagle would miss most would be flying around. If this eagle were to escape from its enclosure it would fly to the top of a cliff and make a nest. If it was a girl.