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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Extreme Weather Pet Door Dog Doors Exterior Cat Entry Large Dogs Heavy Duty M LExtreme Weather Pet Door Dog Doors Exterior Cat Entry Large Dogs Heavy Duty M L $36.40 to $56.34 Ideal Pet Products Flap Plastic/Deluxe Pet DoorIdeal Pet Products Flap Plastic/Deluxe Pet Door $20.55
PetSafe Extreme Weather Doors Triple Flap Design: Small, Medium, LargePetSafe Extreme Weather Doors Triple Flap Design: Small, Medium, Large $54.95 PetSafe Premium Plastic Pet Door ~ White ~ Large Ppa00-10960PetSafe Premium Plastic Pet Door ~ White ~ Large Ppa00-10960 $39.99
Endura Flap™ Dog Doors for WallsEndura Flap™ Dog Doors for Walls $309.99 to $579.99 4 Way Lockable Small Medium Large Dog Cat Puppy Pet Door Flap Magnetic Frame Us4 Way Lockable Small Medium Large Dog Cat Puppy Pet Door Flap Magnetic Frame Us $10.99 to $22.15
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 PetSafe Premium Plastic Pet Door White, Extra Large Ppa00-10961PetSafe Premium Plastic Pet Door White, Extra Large Ppa00-10961 $79.95 Trending at $94.95
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 Original Plastic Dog Door with Aluminum Lining 2-Way Locking Sliding Panel NewOriginal Plastic Dog Door with Aluminum Lining 2-Way Locking Sliding Panel New $42.35
New listing
		PetSafe Electronic Smart DoorNew listing PetSafe Electronic Smart Door $69.99 Perfect Pet Multi-Flex Pet Door XlPerfect Pet Multi-Flex Pet Door Xl $80.00
Namsan Magnetic Automatic Lock/Lockable Pet Screen Door Dog Gate Large, Gen-2Namsan Magnetic Automatic Lock/Lockable Pet Screen Door Dog Gate Large, Gen-2 $30.23 Ideal Pet Products, AirSeal Pet Door Flap Size 10 1/4" x 15 1/4" Brand New.Ideal Pet Products, AirSeal Pet Door Flap Size 10 1/4" x 15 1/4" Brand New. $50.00
X-Large Freedom Aluminum Pet Dog Door Frame Easy Install Pet Safe Solid EntranceX-Large Freedom Aluminum Pet Dog Door Frame Easy Install Pet Safe Solid Entrance $79.99 4 Way Medium Small Large Pet Cat Puppy Dog Magnetic Lock Lockable Flap Door Us-4 Way Medium Small Large Pet Cat Puppy Dog Magnetic Lock Lockable Flap Door Us- $10.77 to $16.77
Petmate Size Large Doghouse Door Dogloo IndigoPetmate Size Large Doghouse Door Dogloo Indigo $16.99 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
Pet Kitten Flap Door 4 Way Waterproof Lockable Safe Gate for Pets Entry & ExitPet Kitten Flap Door 4 Way Waterproof Lockable Safe Gate for Pets Entry & Exit $10.44 Was:  Previous Price $10.99 The Door Shield - Pet Scratch ProtectorThe Door Shield - Pet Scratch Protector $21.33
Ideal Pet Products 80Patmw White Fast Fit Pet Patio Door Medium White 2" X 1.Ideal Pet Products 80Patmw White Fast Fit Pet Patio Door Medium White 2" X 1. $164.80 List price:  Previous Price $173.34 PetSafe Extreme Weather Pet Door White Medium Ppa00-10985PetSafe Extreme Weather Pet Door White Medium Ppa00-10985 $84.95
New listing
		Ruff-Weather Pet Dog Door - Super Large (New) Box Is Damaged 15" x 23 1/2"New listing Ruff-Weather Pet Dog Door - Super Large (New) Box Is Damaged 15" x 23 1/2" $149.00 Ideal Pet Products Designer Series Plastic Pet Door for Through Doors All SizesIdeal Pet Products Designer Series Plastic Pet Door for Through Doors All Sizes $36.00 to $85.00
Commercial Clear Plastic Vinyl Dog House Door Garage Door 8" x 24" x 80milCommercial Clear Plastic Vinyl Dog House Door Garage Door 8" x 24" x 80mil $18.99 New Perfect Pet Extra Large Plastic Pet Door, Flap Size 10 1/2" x 15"New Perfect Pet Extra Large Plastic Pet Door, Flap Size 10 1/2" x 15" $34.99
Instant 80" Pop-Up Pet Door™ for Glass & Sliding Patio Doors. Med 8" x 20" FlapInstant 80" Pop-Up Pet Door™ for Glass & Sliding Patio Doors. Med 8" x 20" Flap $45.95 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 Ideal Products "C" Ruff Weather Pet Door Wall Installation Kit Dog CatNew Ideal Products "C" Ruff Weather Pet Door Wall Installation Kit Dog Cat $29.95 Dog Cat Flap Doors with 4 Way Lock for Pets Entry & Exit-2016 New DesignDog Cat Flap Doors with 4 Way Lock for Pets Entry & Exit-2016 New Design $11.99 List price:  Previous Price $69.95
Petouch Pet Door,Door for Dog and Cat, Low-Maintenance, Extreme Weather EnergyPetouch Pet Door,Door for Dog and Cat, Low-Maintenance, Extreme Weather Energy $24.00 to $90.05 Large 1-100 Lbs PetSafe Freedom Aluminum Pet Door White (Ppa00-10861) NewLarge 1-100 Lbs PetSafe Freedom Aluminum Pet Door White (Ppa00-10861) New $79.99
Pet Door Extra Large Dog Cat 15 x 20 in Original Frame Vinyl Easy Flap Brand NewPet Door Extra Large Dog Cat 15 x 20 in Original Frame Vinyl Easy Flap Brand New $84.65 Ideal Pet Products Replacement Flap for Ruff Weather Pet Door Assorted SizesIdeal Pet Products Replacement Flap for Ruff Weather Pet Door Assorted Sizes $22.20 to $35.52
PetSafe Small SmartDoor Electronic Dog Door Ppa11-10711PetSafe Small SmartDoor Electronic Dog Door Ppa11-10711 $59.95 Trending at $62.95 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
Ideal Ruff-Weather Pet Wall Kit B Medium 4.75" x 7.25" New In BoxIdeal Ruff-Weather Pet Wall Kit B Medium 4.75" x 7.25" New In Box $29.99 Pet/ Doggie Door.Extra Large Xl.Barks Bar.Easy InstallationPet/ Doggie Door.Extra Large Xl.Barks Bar.Easy Installation $49.99
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Rixie Small/ Medium 2-way Dog Door - White WhiteT 00004000 Rixie Small/ Medium 2-way Dog Door - White White $36.99 Large Cat Door with 4 Way Locking, Waterproof Cat Flap Door WhiteLarge Cat Door with 4 Way Locking, Waterproof Cat Flap Door White $14.49
PetSafe Medium Wall Entry Aluminum Pet Door White Dog Doggy Cat Animal 1-40 NewPetSafe Medium Wall Entry Aluminum Pet Door White Dog Doggy Cat Animal 1-40 New $63.99 Trending at $79.98 Ideal Fast Fit Patio DoorsIdeal Fast Fit Patio Doors $99.99
Ideal Pet Products Vinyl Replacement Flap Aluminum Plastic Dog Door Round LogoIdeal Pet Products Vinyl Replacement Flap Aluminum Plastic Dog Door Round Logo $15.95 to $42.95 List price:  Previous Price $49.95 PetSafe Extreme Weather DoorPetSafe Extreme Weather Door $54.95 to $104.95 List price:  Previous Price $119.99
PetSafe Freedom Aluminum Pet Dog Doors Small, Medium, Large, X-LargePetSafe Freedom Aluminum Pet Dog Doors Small, Medium, Large, X-Large $50.99 to $70.99 Petsafe "Extreme Weather" Pet DoorPetsafe "Extreme Weather" Pet Door $79.99 to $149.99
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 Dog Door Pet Door for Sliding Patio Aluminum Screen Super Large White120 PoundsDog Door Pet Door for Sliding Patio Aluminum Screen Super Large White120 Pounds $179.00
Sm 80" Original Pop-Up Pet Door™ Free Shipping! For Glass & Screen Patio DoorsSm 80" Original Pop-Up Pet Door™ Free Shipping! For Glass & Screen Patio Doors $30.00 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
PetSafe Extreme Weather Pet Dog Doors W/ Triple Flaps Large Med Small SizesPetSafe Extreme Weather Pet Dog Doors W/ Triple Flaps Large Med Small Sizes $74.95 to $114.95 PetSafe Plastic Pet Door Ppa00-10959 For Medium (1-40 Lb) Pets New In Open BoxPetSafe Plastic Pet Door Ppa00-10959 For Medium (1-40 Lb) Pets New In Open Box $19.98 Trending a 00004000 t $38.97
PetSafe Pet Door - Aluminum / Plastic - Cat / Dog - Various SizesPetSafe Pet Door - Aluminum / Plastic - Cat / Dog - Various Sizes $24.99 to $79.99 Ideal Pet Products Replacement Flap/New Style Plastic/Deluxe Pet Door Extra L.Ideal Pet Products Replacement Flap/New Style Plastic/Deluxe Pet Door Extra L. $21.60
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 Perfect Pet Medium Pet DoorPerfect Pet Medium Pet Door $35.00
X Large Pet Door Freedom Aluminum Pets Door Dog Frame Easy Install 13-5/8 x 23X Large Pet Door Freedom Aluminum Pets Door Dog Frame Easy Install 13-5/8 x 23 $74.76 27"-32" Window Sash Pet Cat Dog Door 10 1/2" x 15" Extra Large Flap27"-32" Window Sash Pet Cat Dog Door 10 1/2" x 15" Extra Large Flap $129.00
Ideal Pet Products Aluminum Pet Patio X-Large Sliding Pet Door (15-in x 10.5-in)Ideal Pet Products Aluminum Pet Patio X-Large Sliding Pet Door (15-in x 10.5-in) $142.95 Trending at $147.34 PetSafe Pet Dog Cat Screen Door Small Up to 30 lb Easy Install Sealed FreeShipPetSafe Pet Dog Cat Screen Door Small Up to 30 lb Easy Install Sealed FreeShip $19.99
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 $37.22 Dog Vue Trim Kits for dog kennel doorsDog Vue Trim Kits for dog kennel doors $24.00 to $40.00
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 Side Sliding Window Door Hefty Cat Flap sizes 30" to 42" HighIdeal Pet Products Side Sliding Window Door Hefty Cat Flap sizes 30" to 42" High $169.95 to $190.95
X-Large Freedom Aluminum Pet Door Dog Frame Easy Install 13-3/4 in. x 23-3/4 in.X-Large Freedom Aluminum Pet Door Dog Frame Easy Install 13-3/4 in. x 23-3/4 in. $73.50 New PetSafe Xlarge Freedom Aluminum Pet Door Dog Frame Easy InstallNew PetSafe Xlarge Freedom Aluminum Pet Door Dog Frame Easy Install $76.99
Dogloo Xt doghouse door, MediumDogloo Xt doghouse door, Medium $9.90 New listing
		PetSafe Screen Pet DoorNew listing PetSafe Screen Pet Door $23.99
Durable Pet Door Dog Entry Bite Extreme Weather Proof Self-Locking Flap PanelDurable Pet Door Dog Entry Bite Extreme Weather Proof Self-Locking Flap Panel $38.30 to $62.60 Petsafe Plastic Pet Door for Small Dogs and CatsPetsafe Plastic Pet Door for Small Dogs and Cats $24.45
Dog Door Pet Door Ideal Pets Dog Pet Supplies Cat Door Telescoping Frame MediumDog Door Pet Door Ideal Pets Dog Pet Supplies Cat Door Telescoping Frame Medium $48.79 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 $56.91
PetSafe Wall Entry Aluminum Pet Door Medium Ppa11-10916PetSafe Wall Entry Aluminum Pet Door Medium Ppa11-10916 $94.95 Trending at $98.95 PetSafe Extreme Weather Energy Efficient Pet Door Unique 3 Flap System SmallPetSafe Extreme Weather Energy Efficient Pet Door Unique 3 Flap System Small $38.00 Trending at $65.00
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 $25.79 Pair 2 Ruff Weather Replacement Flaps all sizesPair 2 Ruff Weather Replacement Flaps all sizes $34.95 to $73.95
Dog Plastic Door For Small Dogs with Aluminum Lining Soft Flap White Medium NewDog Plastic Door For Small Dogs with Aluminum Lining Soft Flap White Medium New $39.99 Ideal Aluminum Lockable Dog Pet Door Super Large XxlIdeal Aluminum Lockable Dog Pet Door Super Large Xxl $139.99
New listing
		Classic Closing Panel Pet Door Cover for Petsafe Large Aluminum Doors used 2 timNew listing Classic Closing Panel Pet Door Cover for Petsafe Large Aluminum Doors used 2 tim $21.95 Md 80" Original Pop-Up Pet Door™ Free Shipping! For Glass & Screen Sliding DoorsMd 80" Original Pop-Up Pet Door™ Free Shipping! For Glass & Screen Sliding Doors $35.00
Ppa00-10961 Petsafe Plastic Pet Dog Door Extra LargePpa00-10961 Petsafe Plastic Pet Dog Door Extra Large $93.95 12 in. x 16 in. Power Pet Large Electronic Fully Automatic Dog and Cat Electric12 in. x 16 in. Power Pet Large Electronic Fully Automatic Dog and Cat Electric $407.99
Dog House Door Strip 6" x 24" x 60 milDog House Door Strip 6" x 24" x 60 mil $15.00 Smokey Colored Designer Series Ruff Weather Replacement Flaps all sizesSmokey Colored Designer Series Ruff Weather Replacement Flaps all sizes $17.95 to $45.95
Extra Large Abs Plastic Pet Cat Dog Lockable Security Flap Door Gate Frame #S5Extra Large Abs Plastic Pet Cat Dog Lockable Security Flap Door Gate Frame #S5 $39.67 Was:  Previous Price $42.20 Pet Dog&Cat Door Flap Automatic Screen Door Small Large Pets Footprint PatternPet Dog&Cat Door Flap Automatic Screen Door Small Large Pets Footprint Pattern $15.59 to $30.48
PetSafe Freedom Aluminum Pet Door Large 1-100 lb 10-1/8" x 15-3/4" missing panelPetSafe Freedom Aluminum Pet Door Large 1-100 lb 10-1/8" x 15-3/4" missing panel $34.99 PetSafe Replacement Door Flaps for Classic & Wall Entry DoorsPetSafe Replacement Door Flaps for Classic & Wall Entry Doors $17.95 to $36.95
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 Super-Large Ideal Pet Products Replacement Flap Plastic Pet Door Dog 15"X20" NewSuper-Large Ideal Pet Products Replacement Flap Plastic Pet Door Dog 15"X20" New $33.80
Extreme Weather Pet Door Medium Exterior Entry Dog Cat Vinyl Plastic Heavy DutyExtreme Weather Pet Door Medium Exterior Entry Dog Cat Vinyl Plastic Heavy Duty $39.95 Ideal Ruff and All Weather Pet DoorsIdeal Ruff and All Weather Pet Doors $80.00
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 Aluminum Frame Dog DoorAluminum Frame Dog Door $109.00 to $227.77
Freedom Aluminum Pet Access Door Dog Frame Easy Install Gate Small / Large /M/XlFreedom Aluminum Pet Access Door Dog Frame Easy Install Gate Small / Large /M/Xl $73.99 to $101.99 Patio Pet Door Dog Door for Sliding Aluminum Screen Cat White Medium to 35 lbPatio Pet Door Dog Door for Sliding Aluminum Screen Cat White Medium to 35 lb $147.00
Cat Dog Pet Patio Door Panel Insert Ideal Pet Small Aluminum Sliding Magnet FlapCat Dog Pet Patio Door Panel Insert Ideal Pet Small Aluminum Sliding Magnet Flap $91.76 Trending at $101.25 PetSafe Aluminum Pet Door for 1-40lb Pets Hpa11-11599 NewPetSafe Aluminum Pet Door for 1-40lb Pets Hpa11-11599 New $24.00 Was:  Previous Price $59.99
4 Way Magnetic Lock Lockable Safe Flap Door Large Pet Cat Puppy Dog L Size4 Way Magnetic Lock Lockable Safe Flap Door Large Pet Cat Puppy Dog L Size $14.17 Ideal Pet Products Replacement Flap Extra Large. Pet Door Dog Cat Xl 10.5" X 15"Ideal Pet Products Replacement Flap Extra Large. Pet Door Dog Cat Xl 10.5" X 15" $19.49
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Prices current as of last update, 10/13/19 2:27am.

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