Petdoors.com - Pet doors for walls, doors and windows, screens, and sliding glass doors. Also sells containment systems and automatic feeding systems. Petdoors USA - Allows exit and entry through walls, windows, screens, or patio. Also offers electric doors. Patio Door Accessories - Offers a device to allow operation of sliding doors with a wireless remote control or by animals wearing remote collars. Order by phone; ships in Canada and USA. The Cat Terrace - Offers materials, plans and instructional video for building an enclosed terrace that can be installed on a standard screened window. Metalcote - Sells plastic coated wire containment structures. Includes cat baskets, restrainers, rescue traps, and fold flat kennels. UK location. Pupperton - Made in USA. Offers customized, extended-in-home-stay, pet kenneling products. UK Kennels Ltd - Products include handmade wooden dog and cat kennels, dog runs and rabbit hutches. Ships throughout UK and much of Europe. Ideal Pet Products - Supplying a range of portal doors, for dogs and cats.