Given 'Chased him all the way up to the upstairs, I don't think the bird ever even pooped in the house not that we found--', does 'The bird never relieved itself in the house.' exist in a neutral realm, neither confirming nor denying the premise?
Chased him all the way up to the upstairs, I don't think the bird ever even pooped in the house not that we found--###The bird never relieved itself in the house.