Thank you! Not very... a few months maybe.. he was still smallish when he escaped... a friend of mine who does wildlife rehab asked me recently if I wanted one she had as they are not releasable... they are invasive and are destroying our wetlands.. there is a bounty on them.. $5 a tail! But I said no.. that was kinda hard as they are adorable and make sweet pets.. they will follow you around like a puppy! But they will destroy your yard so you really need a good strong fence that they can’t dig out of and a yard of their own... they also eat huge amounts of vegetation!Cute pictures...how long did you have the nutria?