Hi, sorry to hear of your troubles. Muscovies are not migratory, like Mallards are. But I have known them to wander...especially along creeks. Whether he'll try to get back home if you relocate him is a question I can't answer. ..but I doubt he'd try to make a 7 mile journey. Your bossy drake may need a mate, (are there other ducks with him?,,,ideally he should be in a flock of other muscovies.) But he may stay bossy, even then, but the other ducks will keep his attention . He can be confined with no ill effect if that is your only choice. Also, it is illegal to "let them go" in many areas, so you might want to think about where you re-home him if that is your choice. Good luck. and I'm sorry your neighbor is such a meanie.