Its an insulated wood doghouse. 26" H x 26" W x 24" D Could a male female pair of muscoies fit in there ?? Also with a little mallard squeezed in ,perhaps ?? Or would I have to go with the larger sized 34" H x 35" W x 28" ?? Or bigger still ?? This will only be for them to sleep in at night/hide in during storms/heavy snow/the lovely Canadian -40 celcius cold spurts.