A cat flap in action.A wall-mounted flap with access tunnel.

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Dog Doors

A cat flap (also known as a doggie door or pet door) is a hinged flap set into a door, wall or window to allow cats, dogs, or other domestic pets to enter and exit a house on their own without needing a human to open the door. more...

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They are very popular with cat owners, many of whom like to encourage their cats' natural independence by letting them come and go at will — particularly in the United Kingdom where it is believed that about 90% of all cats (including ferals) have access to the outdoors, many of these via cat flaps (). Flaps for most dogs must be bigger and therefore are often constructed differently; except in rural areas they tend to give access to fenced-in yards or gardens rather than the neighborhood at large.

The simplest are just weighted flaps, but these can have problems with wind blowing open the flap or making a rattling noise. A magnet on the flap addresses this issue by holding the door in place when not in use, but not so securely as to prevent access. Sometimes a flap will also have adjustable catches to restrict the opening of the flap in one direction or the other — for example to allow the animal to come in, but not go out again. More sophisticated flaps have electromagnetic catches that can detect a matching permanent magnet worn on the animal's collar and unlock the flap as the animal approaches, thus preventing any other animals using the flap to enter the house.

Devotees suggest a pet door should be set at a height so that the bottom of the opening is just a little lower than the belly of the animal when standing. Many animals prefer to use a flap with a transparent flap, so that they can be sure there is nothing threatening outside before leaving the safety of the home.

The invention of the cat flap is often attributed to Sir Isaac Newton in the seventeenth century; this story, however, is usually related (, for example) without any sources to support it.

Read more at Wikipedia.org


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PetSafe Replacement Door Flap for Classic & Wall Entry Doors Medium 4-0111-11PetSafe Replacement Door Flap for Classic & Wall Entry Doors Medium 4-0111-11 $21.95 Trending at $23.95 Ideal Screen Guard Pet Door - Medium Authorized DealerIdeal Screen Guard Pet Door - Medium Authorized Dealer $49.75
PetSafe Extreme Weather Pet Dog Doors W/ Triple FlapsPetSafe Extreme Weather Pet Dog Doors W/ Triple Flaps $74.99 to $114.99 PetSafe Premium Plastic Pet Door ~ White ~ Large Ppa00-10960PetSafe Premium Plastic Pet Door ~ White ~ Large Ppa00-10960 $39.99
Pet Door Extra Large Frame Durable Easy Install Dog Doggie Flap Mount Secure XlPet Door Extra Large Frame Durable Easy Install Dog Doggie Flap Mount Secure Xl $57.79 Magnetic Automatic Lockable Dog Cat Pet Flap Safe Door Gate Way Screens 12x16Magnetic Automatic Lockable Dog Cat Pet Flap Safe Door Gate Way Screens 12x16 $39.99
PetSafe Magnetic Replacement Pet Door Flap ~ Medium ~ 8"Wx11"H P/N 700-415PetSafe Magnetic Replacement Pet Door Flap ~ Medium ~ 8"Wx11"H P/N 700-415 $22.88 Petsafe Plastic Pet Dog Door Large Breed Ppa00-10960 NewPetsafe Plastic Pet Dog Door Large Breed Ppa00-10960 New $32.47 Was:  Previous Price $49.95
Pet Door Extreme Weather Dog Medium Exterior Cat Entry Dogs Heavy Duty 7x11 InchPet Door Extreme Weather Dog Medium Exterior Cat Entry Dogs Heavy Duty 7x11 Inch $46.99 Perfect Pet Deluxe Aluminum Pet Door in WhitePerfect Pet Deluxe Aluminum Pet Door in White $65.99 to $94.99
SportPet Designs Travel Pop up Crate Red for DogsSportPet Designs Travel Pop up Crate Red for Dogs $24.09 to $44.99 List price:  Previous Price $29.99 PetSafe Freedom Aluminum Pet Doors White, Small, Medium, Large & X-LargePetSafe Freedom Aluminum Pet Doors White, Small, Medium, Large & X-Large $44.95 to $114.95
Ideal Pet Products Designer Series Ruff Weather Dog Door-All SizesIdeal Pet Products Designer Series Ruff Weather Dog Door-All Sizes $83.00 to $165.00 Dog Screen Door for Sliding Screen Magnetic Automatic Lock Pet Dogs Puppies .Dog Screen Door for Sliding Screen Magnetic Automatic Lock Pet Dogs Puppies . $37.17
4 Way Lock Lockable Pets Safe Flap Door Fit for Dog Cat Small with Tunnel4 Way Lock Lockable Pets Safe Flap Door Fit for Dog Cat Small with Tunnel $16.75 Pet Safety Gate Indoor Dog Cat Walk Thru Fence Baby Toddler Child Barrier SafePet Safety Gate Indoor Dog Cat Walk Thru Fence Baby Toddler Child Barrier Safe $25.99
Pair 2 Ruff Weather Replacement Flaps all sizesPair 2 Ruff Weather Replacement Flaps all sizes $34.95 to $73.95 4 Way Cat Dog Lock Lockable Frame Safe Flap Door Gate For Large Medium Pet 18lb4 Way Cat Dog Lock Lockable Frame Safe Flap Door Gate For Large Medium Pet 18lb $14.98
New listing
		Pet Gates Extra Wide for Stairs Expandable Gate with Small Pet Door AdjustableNew listing Pet Gates Extra Wide for Stairs Expandable Gate with Small Pet Door Adjustable $37.02 Dog Mate Large Dog DoorsDog Mate Large Dog Doors $69.01
PetSafe Extreme Weather Pet Door Dog Doors Exterior Entry Large Dogs NewPetSafe Extreme Weather Pet Door Dog Doors Exterior Entry Large Dogs New $69.99 Extreme Weather Pet Door Dog Doors Exterior Entry Large Dogs Heavy Duty NewExtreme Weather Pet Door Dog Doors Exterior Entry Large Dogs Heavy Duty New $34.99
White 4-Way Medium Pet Cat Kitten Small Lockable Safe Flap Door Us StockWhite 4-Way Medium Pet Cat Kitten Small Lockable Safe Flap Door Us Stock $7.89 Trending at $8.78 Pet Safe Medium Easy Fit Pet Door 1-40Pounds G2-Mw-11*New In Box*Free ShipPet Safe Medium Easy Fit Pet Door 1-40Pounds G2-Mw-11*New In Box*Free Ship $34.99
Ideal Ruff Weather Designer Series Door Mount Pet Door - All SizesIdeal Ruff Weather Designer Series Door Mount Pet Door - All Sizes $83.00 to $165.00 Extra Large Dog Pet Door Patio Flap Aluminum Sliding Glass Slider Insert 10.5x15Extra Large Dog Pet Door Patio Flap Aluminum Sliding Glass Slider Insert 10.5x15 $163.80
Pride Pet Door Rubber Assembly Replacement Door Flap in medium, large or X-largePride Pet Door Rubber Assembly Replacement Door Flap in medium, large or X-large $41.95 to $76.95 Lockable Plastic Dog Cat Kitty for Screen Door Window Screen Flap Door for PetsLockable Plastic Dog Cat Kitty for Screen Door Window Screen Flap Door for Pets $22.17 to $35.22
Pet Flap Door 4 Way Waterproof Lockable Safe Gate for Cats Puppy Small Dog S/M/LPet Flap Door 4 Way Waterproof Lockable Safe Gate for Cats Puppy Small Dog S/M/L $11.99 to $17.99 Pet Screen Door - Dog and Cat Door for Screen Door, Window and Porch UsePet Screen Door - Dog and Cat Door for Screen Door, Window and Porch Use $22.75
PetSafe Plastic Dog Pet Door - X-Large Large Med Small ( Authorized Dealer)PetSafe Plastic Dog Pet Door - X-Large Large Med Small ( Authorized Dealer) $44.95 to $104.95 Pet Screen Door Magnetic Flap Screen Automatic Lockable Black Door Large 14 x 12Pet Screen Door Magnetic Flap Screen Automatic Lockable Black Door Large 14 x 12 $57.25
Walk thru Baby Pet Safety Safe Extra Tall Gate DoorWalk thru Baby Pet Safety Safe Extra Tall Gate Door $47.68 SureFlap Model Sur101, for Microchip Pet DoorSureFlap Model Sur101, for Microchip Pet Door $33.45
PetSafe Freedom Aluminum Pet Door - Small (Model Ppa00-10859) *Brand New*PetSafe Freedom Aluminum Pet Door - Small (Model Ppa00-10859) *Brand New* $28.50 Patio Pet Door Panel Cat Dog Aluminum Frame Sliding Glass Flap Fits Medium WhitePatio Pet Door Panel Cat Dog Aluminum Frame Sliding Glass Flap Fits Medium White $142.50
New listing
		Ideal Pet Products Replacement Flap (Extra Large - 10-1/2" x 15" Flap Size)New listing Ideal Pet Products Replacement Flap (Extra Large - 10-1/2" x 15" Flap Size) $28.33 Carlson Pet Products Lil' Tuffy Expandable Gate with Small Pet DoorCarlson Pet Products Lil' Tuffy Expandable Gate with Small Pet Door $21.24
Smokey Colored Designer Series Ruff Weather Replacement Flaps all sizesSmokey Colored Designer Series Ruff Weather Replacement Flaps all sizes $17.95 to $4 00004000 5.95 Perfect Pet All Weather Wall Installation Kit wall for All Weather Pet DoorsPerfect Pet All Weather Wall Installation Kit wall for All Weather Pet Doors $29.95 to $45.95
4 Ways Medium Small Large Pet Cat Puppy Dog Lock Lockable Safe Flap Door Gate4 Ways Medium Small Large Pet Cat Puppy Dog Lock Lockable Safe Flap Door Gate $12.69 to $21.99 Magnador Two Way Pet Door (Brand New) White-Size Large 50 Lbs & OverMagnador Two Way Pet Door (Brand New) White-Size Large 50 Lbs & Over $39.95
White Pets Convenient Door Safety Wall Entry for Dogs or CatsWhite Pets Convenient Door Safety Wall Entry for Dogs or Cats $59.00 Ideal Pet Products Designer Series Plastic Pet Door for Through Door Size MediumIdeal Pet Products Designer Series Plastic Pet Door for Through Door Size Medium $29.00
(New) PetSafe Small SmartDoor Electronic Dog Door, Small(New) PetSafe Small SmartDoor Electronic Dog Door, Small $79.99 PetSafe Extreme Weather Pet Door White, 3 Sizes Small, Medium, LargePetSafe Extreme Weather Pet Door White, 3 Sizes Small, Medium, Large $54.95 to $104.95
Trixie Extra Large 4-way Cat Door with Tunnel - WhiteTrixie Extra Large 4-way Cat Door with Tunnel - White $19.49 New listing
		Dog&Cat Flap Door With 4 Way Lockable Small Medium Pet safe Entry&Exit Us StockNew listing Dog&Cat Flap Door With 4 Way Lockable Small Medium Pet safe Entry&Exit Us Stock $8.45
Screen Door Dog Footprint Pattern Cat Window Screen Doggie Flap Safe Pet SupplieScreen Door Dog Footprint Pattern Cat Window Screen Doggie Flap Safe Pet Supplie $15.99 to $35.22 Doggy Door Large Pet Entrance Mount Flap Frame Opening Big Dog Cat WeatherproofDoggy Door Large Pet Entrance Mount Flap Frame Opening Big Dog Cat Weatherproof $82.99
New listing
		Dog Cat Mate 4 Way Locking Large Cat Small Dog Flap White Catflap Pet Door N2G8ENew listing Dog Cat Mate 4 Way Locking Large Cat Small Dog Flap White Catflap Pet Door N2G8E $12.08 to $17.56 Ideal Fast Fit Patio DoorsIdeal Fast Fit Patio Doors $99.99
PetSafe SmartDoor Smart Door Electronic Pet DoorPetSafe SmartDoor Smart Door Electronic Pet Door $94.95 to $149.95 PetSafe Wall Entry Aluminum Dog Door Double Flap System Small, size 5"×7"PetSafe Wall Entry Aluminum Dog Door Double Flap System Small, size 5"×7" $65.00
Dog Vue Trim Kits for dog kennel doorsDog Vue Trim Kits for dog kennel doors $24.00 to $40.00 PetSafe Ppa11-10915 Wall Entry Aluminum Pet Door with Double-Flap System - SmallPetSafe Ppa11-10915 Wall Entry Aluminum Pet Door with Double-Flap System - Small $64.95 List price:  Previous Price $74.99
Animaze 1-Door Folding Dog CrateAnimaze 1-Door Folding Dog Crate $10.99 to $46.99 List price:  Previous Price $49.99 Upgraded Oem Screws & Lock Nuts For Xlarge Xl Freedom Door PetSafe Pac11-11040Upgraded Oem Screws & Lock Nuts For Xlarge Xl Freedom Door PetSafe Pac11-11040 $4.00
New listing
		Petsafe Wall Entry Aluminum Pet Door large dog cat doorNew listing Petsafe Wall Entry Aluminum Pet Door large dog cat door $29.00 Dog Pet Window Sill Ledge Protector - Sill Shield Guard Cover Prevents ScratchesDog Pet Window Sill Ledge Protector - Sill Shield Guard Cover Prevents Scratches $15.99 to $17.99
Trixie Medium/ Extra Large 2-way Dog Door - WhiteTrixie Medium/ Extra Large 2-way Dog Door - White $46.99 New! PetSafe Plastic Pet Door White Large (1-100 Lbs)New! PetSafe Plastic Pet Door White Large (1-100 Lbs) $55.00
New listing
		PetSafe PassPort Ppa00-15931 Smart Door Plus Medium Size - New -New listing PetSafe PassPort Ppa00-15931 Smart Door Plus Medium Size - New - $159.00 PetSafe Wall Entry Aluminum Pet Door Medium (1-40 lb) Diy Model Ppa11-10916 NewPetSafe Wall Entry Aluminum Pet Door Medium (1-40 lb) Diy Model Ppa11-10916 New $47.95
New PetSafe Medium Freedom Aluminum Pet Door Dog Frame w/cover - Easy InstallNew PetSafe Medium Freedom Aluminum Pet Door Dog Frame w/cover - Easy Install $26.99 PetSafe Replacement Flap For Freedom Aluminum Pet, Plastic Pet and Extreme DoorsPetSafe Replacement Flap For Freedom Aluminum Pet, Plastic Pet and Extreme Doors $19.95 to $54.95
Midwest WalkThru Steel Pet Gate with Safety Glow Framed for Dogs in WhiteMidwest WalkThru Steel Pet Gate with Safety Glow Framed for Dogs in White $57.99 to $64.99 List price:  Previous Price $109.99 PetSafe Deluxe Bronze Patio Panel Pet DoorsPetSafe Deluxe Bronze Patio Panel Pet Doors $134.95 to $209.95 List price:  Previous Price $239.99
Petsafe Electronic Pet Door + 1 Collar Key • Size SmallPetsafe Electronic Pet Door + 1 Collar Key • Size Small $55.00 Extra Large Deluxe Aluminum Frame Pet Door Magnetic Flap Dog Cat 10.5 In X 15 InExtra Large Deluxe Aluminum Frame Pet Door Magnetic Flap Dog Cat 10.5 In X 15 In $55.49
PetSafe Extreme Weather Doors Triple Flap Design: Small, Medium, LargePetSafe Extreme Weather Doors Triple Flap Design: Small, Medium, Large $54.95 SureFlap Microchip Pet Door, White. Cat or dog - new!SureFlap Microchip Pet Door, White. Cat or dog - new! $31.00
Petmate Doghouse Door, Barnhome, Homestead Petbarn, Woodstone Manor Medium LargePetmate Doghouse Door, Barnhome, Homestead Petbarn, Woodstone Manor Medium Large $16.95 to $21.95 Ideal Plastic Pet Door Super Large White 15" x 20"Ideal Plastic Pet Door Super Large White 15" x 20" $51.97 Was:  Previous Price $79.95
New PetSafe Xlarge Freedom Aluminum Pet Door Dog Frame Easy InstallNew PetSafe Xlarge Freedom Aluminum Pet Door Dog Frame Easy Install $78.99 Car Door Protector for your dogCar Door Protector for your dog $14.99
4 Way Medium Small Large Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door4 Way Medium Small Large Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door $9.99 to $11.99 PetSafe Extreme Weather Large Pet Door Ppa00-10986PetSafe Extreme Weather Large Pet Door Ppa00-10986 $104.95
Niob Petsafe Ppa00-10859 Freedom Aluminum Pet Door Small 1-15lbs -Fast ShippingNiob Petsafe Ppa00-10859 Freedom Aluminum Pet Door Small 1-15lbs -Fast Shipping $26.00 4 Way Large Pet Magnetic Lock Lockable Safe Flap Door Gate Cat Puppy Dog L Size4 Way Large Pet Magnetic Lock Lockable Safe Flap Door Gate Cat Puppy Dog L Size $14.99
Pet Door Gate 10.5" X 15" FlapTelescoping Frame Secure Dog Entrance Extra LargePet Door Gate 10.5" X 15" FlapTelescoping Frame Secure Dog Entrance Extra Large $50.99 Ideal Pet Products Deluxe Aluminum Pet Door Xl 10.5" x 15" w/ Telescoping FrameIdeal Pet Products Deluxe Aluminum Pet Door Xl 10.5" x 15" w/ Telescoping Frame $79.99
PetSafe Single Dog Door Replacement Flap Large 10" x 15" - 4-0113-11PetSafe Single Dog Door Replacement Flap Large 10" x 15" - 4-0113-11 $34.95 PetSafe Pet Door - Aluminum / Plastic - Cat / Dog - Various SizesPetSafe Pet Door - Aluminum / Plastic - Cat / Dog - Various Sizes $24.99 to $89.99
PetSafe Extreme Weather Pet Door Large 10⅛" x 16¼ ” Ppa00-10986PetSafe Extreme Weather Pet Door Large 10⅛" x 16¼ ” Ppa00-10986 $103.99 Medium Breed Locking Pet Door, 11" x 9" Opening & Hard Plastic FlapMedium Breed Locking Pet Door, 11" x 9" Opening & Hard Plastic Flap $39.99
Perfect Pet All Weather Pet Doors in Small, Medium, X-Large, or Super Large SizePerfect Pet All Weather Pet Doors in Small, Medium, X-Large, or Super Large Size $87.95 to $169.95 Ideal Pet Products Xl Heavy Duty Aluminum Pet Door New Look!<
00004000
/a>Ideal Pet Products Xl Heavy Duty Aluminum Pet Door New Look!< 00004000 /a> $29.99
Extra Large Deluxe Plastic Frame Pet Door Magnetic Flap Dog Cat 10.5 In X 15 InExtra Large Deluxe Plastic Frame Pet Door Magnetic Flap Dog Cat 10.5 In X 15 In PetSafe Plastic Xl Extra-Large Dog Pet Door Premium Ppa00-10961 Dogs 12-200 lbsPetSafe Plastic Xl Extra-Large Dog Pet Door Premium Ppa00-10961 Dogs 12-200 lbs $94.95 List price:  Previous Price $109.95
PetSafe Wall Dual Entry Aluminium Telescoping Pet Door for Dogs- Large Med SmallPetSafe Wall Dual Entry Aluminium Telescoping Pet Door for Dogs- Large Med Small $82.95 to $129.95 Ideal Pet Air-Seal Pet Doors in Medium or Extra Large Size for energy efficiencyIdeal Pet Air-Seal Pet Doors in Medium or Extra Large Size for energy efficiency $71.95 to $91.95
4 Way Lock Lockable Pets Safe Flap Door Fit for Dog Cat Small Medium with tunnel4 Way Lock Lockable Pets Safe Flap Door Fit for Dog Cat Small Medium with tunnel $23.95 Ideal Pet Products Premium DraftStopper Pet Door Extra Large Aluminium FrameIdeal Pet Products Premium DraftStopper Pet Door Extra Large Aluminium Frame $72.35 Was:  Previous Price $85.12
PetSafe Freedom Aluminum Pet Door Medium 1-40lb Cats/DogsPetSafe Freedom Aluminum Pet Door Medium 1-40lb Cats/Dogs $29.95 Trending at $34.99 PetSafe Electronic Smart Pet Dog Door Large up to 100lbs Ppa11-10709PetSafe Electronic Smart Pet Dog Door Large up to 100lbs Ppa11-10709 $44.00
Ideal Pet Super Large Plastic Pet Door 15" x 20"Ideal Pet Super Large Plastic Pet Door 15" x 20" $42.00 18" x 14" Magnetic Automatic Lock Pet Screen Door for M & L Size Dogs Cats Black18" x 14" Magnetic Automatic Lock Pet Screen Door for M & L Size Dogs Cats Black $17.99
Magnetic Automatic Lockable Pet Screen Door Dog Gate Way Pet Door for ScreensMagnetic Automatic Lockable Pet Screen Door Dog Gate Way Pet Door for Screens $22.99 Ideal Pet Products Replacement Flap for Ultra Flex Med or Extra Large Pet DoorsIdeal Pet Products Replacement Flap for Ultra Flex Med or Extra Large Pet Doors $25.00 to $36.00
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Prices current as of last update, 07/16/19 12:57pm.

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