A-Plus Pet Screen Doors - Allows pets access to the inside and outside of homes.

Cat-Dog-Doors - Offers pet doors vehicle barriers pet gates and flaps.

Cats Curtains - Custom made curtains for cat and dog flaps. Handmade to fit without the need for screws or glue. UK location.

Dog Door Store - Supplying a range of portal doors crates backpacks and travel bowls. Illustrated descriptions and specifications.

Friendly Fence - Offers dog and cat fence kits accessories and installation tools.

Highland Pet Supplies - Offering manual and electronic doors. Includes installation guides and door specifications.

Patio Door Accessories - Offers a device to allow operation of sliding doors by animals wearing remote collars.

Patio Pacific Inc. - Pet doors for walls doors and windows screens and sliding glass doors. Also sells containment systems and automatic feeding systems.

Pet Door Concepts - Offers doors for walls french doors and glass.

Petdoors USA - Allows exit and entry through walls windows screens or patio. Also offers electric doors.