i think some folk keep their birds in wire like that, its not them escaping you need to worry about. Its about something else getting in. Those holes are large enough for anything to reach on in and distrupt all them, tear at them, eat them. Its a sutible cage yea, but i'd cover/replace the wire with 1/4'' around the sides, then i'd raise it off the ground with 1/2" on the bottom(hardware cloth)