The geese probably need their own protected area at night due to predators. They only get possessive of their area when they are breeding. I don't see a problem especially if they are the only geese. Maybe we are even overthinking the what ifs. Right now they are on an acre with a pool and at night they have a large kennel with an attached coop. The kennel is completely predator proof and they stay outside at night....sometimes they will go inside. They eat their food at night. They are like watchdogs but only make noise if someone has invaded the property.