我們裝了這種Doggie Door。安裝很方便的，不用再牆上大洞。強力推薦。Home Depot 有買的。

http://www.homedepot.com/p/Ideal-Pet-10-5-in-x-15-in-Extra-Large-White-Aluminum-Pet-Patio-Door-Fits-77-6-in-to-80-4-in-Standard-Alum-Slider-80PATXLW/100404339