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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Lockable Dog Cat Pet Frame Flap Door 17"x14"/13"x11" X Xl MagneticLockable Dog Cat Pet Frame Flap Door 17"x14"/13"x11" X Xl Magnetic $38.90 Extreme Weather Pet Door Dog Doors Exterior Cat Entry Large Dogs Heavy Duty NewExtreme Weather Pet Door Dog Doors Exterior Cat Entry Large Dogs Heavy Duty New $49.52
17"x14" Extra Large Pet Dog Door Cat Lockable Telescoping Frame M/L for Big Dog17"x14" Extra Large Pet Dog Door Cat Lockable Telescoping Frame M/L for Big Dog $26.51 Ideal Pet Products Replacement Flap for Ultra Flex Extra Large Dog Cat Pet DoorIdeal Pet Products Replacement Flap for Ultra Flex Extra Large Dog Cat Pet Door $35.07
PetSafe Pet Door Replacement Flap Extra Large Pac11 11040PetSafe Pet Door Replacement Flap Extra Large Pac11 11040 $31.43 Ideal Pet Products Rwm Energy Saver Dog Door Medium M Ruff Weather All ClimateIdeal Pet Products Rwm Energy Saver Dog Door Medium M Ruff Weather All Climate $69.99 Trending at $127.69
Dog Door Extra Large Cat Pet Flap Door Magnetic Closure Aluminum FrameDog Door Extra Large Cat Pet Flap Door Magnetic Closure Aluminum Frame $51.24 Extreme Weather Pet Door Dog Doors Exterior Cat Entry Dogs Heavy Duty NewExtreme Weather Pet Door Dog Doors Exterior Cat Entry Dogs Heavy Duty New $36.72
Gate and Play Yard, White, 192-Inch, Kids Gate, Perfect for Pets/Dogs/Cats.Gate and Play Yard, White, 192-Inch, Kids Gate, Perfect for Pets/Dogs/Cats. $89.99 Ideal Pet Products Ppdm 9" X 14-13/16" Medium Thermoplastic Pet DoorIdeal Pet Products Ppdm 9" X 14-13/16" Medium Thermoplastic Pet Door $35.75 List price: Previous Price $42.90
Pet Safe Replacement Door Flap Xl Extra Large Freedom Door For Dogs and Cats OnePet Safe Replacement Door Flap Xl Extra Large Freedom Door For Dogs and Cats One $37.39 PetSafe Ppa11-10915 Wall Entry Aluminium Pet Door Small NewPetSafe Ppa11-10915 Wall Entry Aluminium Pet Door Small New $60.31
4Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door S/M/L Ew4Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door S/M/L Ew $34.55 Brown 4 Way Locking Lockable Pet Cat Dog Magnetic Lock Flap Door Gate S M L SizeBrown 4 Way Locking Lockable Pet Cat Dog Magnetic Lock Flap Door Gate S M L Size $11.95 to $15.95
PetSafe Wall Entry Aluminum Pet Door Large Ppa11-10917PetSafe Wall Entry Aluminum Pet Door Large Ppa11-10917 $109.95 Dog Block Door With Telescoping Frame Super Large Xxl 15" X 20"Lockable Dog DoorDog Block Door With Telescoping Frame Super Large Xxl 15" X 20"Lockable Dog Door $105.83
New listing
		Ideal Pet Products Ruff-Weather Door with Telescoping FrameNew listing Ideal Pet Products Ruff-Weather Door with Telescoping Frame $108.80 Wall kit for all weather dog door, Extra Large, for 4.75" to 7.25" thicknessWall kit for all weather dog door, Extra Large, for 4.75" to 7.25" thickness $24.97
PetSafe Extreme Weather Large Dog Door Ppa00-10986PetSafe Extreme Weather Large Dog Door Ppa00-10986 $99.95 High Tech Pet Products Extra Collar for Power Pet Doors in Model Ms-4 or Ms-5High Tech Pet Products Extra Collar for Power Pet Doors in Model Ms-4 or Ms-5 $39.99 to $49.99
PetSafe Ppa11-10916 Wall Entry Aluminum Pet DoorPetSafe Ppa11-10916 Wall Entry Aluminum Pet Door $89.95 Deer Creek Aluminum Dog Door covers 11" x 16" openingDeer Creek Aluminum Dog Door covers 11" x 16" opening $26.95
Ideal Pet Products Chubby Kat Plastic Med Ck Pet Door 1.1825" x 9.5" x 14.5" NewIdeal Pet Products Chubby Kat Plastic Med Ck Pet Door 1.1825" x 9.5" x 14.5" New $36.52 PetSafe Pet Door Replacement Flap, Large, Pac11-11039PetSafe Pet Door Replacement Flap, Large, Pac11-11039 $28.57
Electric Pet Door Home Safety Large Electronic Fully Automatic Dog Cat PetsElectric Pet Door Home Safety Large Electronic Fully Automatic Dog Cat Pets $317.99 Trending at $349.99 Ideal Aluminum Lockable Dog Pet Door Super Large XxlIdeal Aluminum Lockable Dog Pet Door Super Large Xxl 00004000 $139.99
Ideal *Ruff Weather* Pet Dog Insulated Door Dual 2 Flaps-*All Sizes*Ideal *Ruff Weather* Pet Dog Insulated Door Dual 2 Flaps-*All Sizes* $87.69 to $186.69 Extra Large Xl 16"X 13" automatically Magnetic Lockable Pet Cat Dog Flap DoorExtra Large Xl 16"X 13" automatically Magnetic Lockable Pet Cat Dog Flap Door $38.90
PetSafe Dog and Cat Door Replacement Flap, Large, 10 1/8" x 16 7/8", Pac11-11039PetSafe Dog and Cat Door Replacement Flap, Large, 10 1/8" x 16 7/8", Pac11-11039 $26.36 PetSafe Replacement Flap for PetSafe Freedom Pet Door LargePetSafe Replacement Flap for PetSafe Freedom Pet Door Large $26.29
PetSafe Pet Door Replacement Flap, Small, Pac1111037, New, Free ShippingPetSafe Pet Door Replacement Flap, Small, Pac1111037, New, Free Shipping $12.23 List price: Previous Price $19.99 PetSafe Dog and Cat Door Replacement Flap, X-Large, 13 5/8" x 24 3/8", Pac11-110PetSafe Dog and Cat Door Replacement Flap, X-Large, 13 5/8" x 24 3/8", Pac11-110 $31.01
Ideal Pet Products 5-by-7-Inch Small Original Pet Door with Telescoping FrameIdeal Pet Products 5-by-7-Inch Small Original Pet Door with Telescoping Frame $29.07 PetSafe Classic Replacement Flap, Medium, 700-415PetSafe Classic Replacement Flap, Medium, 700-415 $13.77
PetSafe Pet Door Replacement Flap NewPetSafe Pet Door Replacement Flap New $12.99 to $20.33 New listing
		Ideal Pet Products Designer Series Plastic Door with Telescoping FrameNew listing Ideal Pet Products Designer Series Plastic Door with Telescoping Frame $61.01
4Way Magnetic Lockable Cat Kitten Dog Pet Entry&Exit Safe Flap Door S M L 17x14"4Way Magnetic Lockable Cat Kitten Dog Pet Entry&Exit Safe Flap Door S M L 17x14" $10.25 to $34.55 New listing
		Pet Door Furniture Shield Dog Puppy Cat Anti Scratch Paw Damage Protector Cover
00004000New listing Pet Door Furniture Shield Dog Puppy Cat Anti Scratch Paw Damage Protector Cover 00004000 $22.40
PetSafe Wall Entry Aluminum Pet Door Small Ppa11-10915PetSafe Wall Entry Aluminum Pet Door Small Ppa11-10915 $59.95 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
Dogloo Door, XlargeDogloo Door, Xlarge $24.27 List price: Previous Price $29.99 Patio Pet Door Sliding Glass Aluminum Dog Flap Cat Door Adjustable Height LockPatio Pet Door Sliding Glass Aluminum Dog Flap Cat Door Adjustable Height Lock $166.10
Replacement Flap Ideal "Original" Plastic Frame Dog Pet Door-*All Sizes*Replacement Flap Ideal "Original" Plastic Frame Dog Pet Door-*All Sizes* $18.00 to $39.01 New listing
		Ideal Pet Products Replacement Flap/New Style Plastic/Deluxe DoorNew listing Ideal Pet Products Replacement Flap/New Style Plastic/Deluxe Door $26.04
AutoSlide Deluxe Automatic Opening Patio Pet Dog Door System in Black or WhiteAutoSlide Deluxe Automatic Opening Patio Pet Dog Door System in Black or White $479.99 New listing
		Ideal Pet Products Replacement Flap for Ruff Weather DoorNew listing Ideal Pet Products Replacement Flap for Ruff Weather Door $38.12
Pride Rubber Assembly Replacement Pet Door Flap 3 size availablePride Rubber Assembly Replacement Pet Door Flap 3 size available $53.99 to $84.99 Ideal Super Large Original Frame Pet Dog Door Ppdsl 15' X 20"Ideal Super Large Original Frame Pet Dog Door Ppdsl 15' X 20" $85.00 Trending at $90.06
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 $49.67 PetSafe SmartDoor Smart Door Electronic Pet DoorPetSafe SmartDoor Smart Door Electronic Pet Door $89.95 to $139.95
13"x11" or 17"x14" Magnetic Dog Cat Kitty Pet Flap Door Lockable Gate Er99 Us13"x11" or 17"x14" Magnetic Dog Cat Kitty Pet Flap Door Lockable Gate Er99 Us $28.04 Trending at $33.50 Petsafe Freedom Aluminum Pet Dog Doors X-large, Large, Med, Small-Full WarrantyPetsafe Freedom Aluminum Pet Dog Doors X-large, Large, Med, Small-Full Warranty $64.95 to $129.95
Ideal Pet Products Replacement Flap For Ruff Weather Pet Door Rwrfxl NewIdeal Pet Products Replacement Flap For Ruff Weather Pet Door Rwrfxl New $29.26 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 $23.90
Ruff Weather, All Weather, Perfect Pet 1 pair Fur Weather Stripping All sizesRuff Weather, All Weather, Perfect Pet 1 pair Fur Weather Stripping All sizes $6.00 to $14.00 Classy Custom Alley Deluxe Pet Door Portal grey Medium Petite New Nib #1Classy Custom Alley Deluxe Pet Door Portal grey Medium Petite New Nib #1 $15.00
Extra Large Pet Dog Door Doggie Cat Patio Glass Sliding Aluminum Mount FlapExtra Large Pet Dog Door Doggie Cat Patio Glass Sliding Aluminum Mount Flap $153.40 PetSafe Premium Plastic Pet Door White, Extra Large Ppa00-10961PetSafe Premium Plastic Pet Door White, Extra Large Ppa00-10961 $84.95 Trending at $93.50
New! Petsafe Electronic Smart Door Small 4-15lbs (Ppa11-10711)New! Petsafe Electronic Smart Door Small 4-15lbs (Ppa11-10711) $69.99 Trending at $139.94 Patio Panel Pet Door Dog Cat Sliding Glass Aluminum Xl Flap Exterior DoggiePatio Panel Pet Door Dog Cat Sliding Glass Aluminum Xl Flap Exterior Doggie $184.99
wall kit for all weather dog door, medium, for 4.75" to 7.25" wall thickness Newwall kit for all weather dog door, medium, for 4.75" to 7.25" wall thickness New $42.99 PetSafe Replacement Flap Freedom Aluminum- Plastic- Extreme Weather Dog Pet DoorPetSafe Replacement Flap Freedom Aluminum- Plastic- Extreme Weather Dog Pet Door $24.95 to $59.95
S/L Size Easy Screen Pet Door Gate Way for Medium or Large Dogs Cats Puppy KittyS/L Size Easy Screen Pet Door Gate Way for Medium or Large Dogs Cats Puppy Kitty $17.90 to $18.90 Carlson Extra Tall Pet Gate with small pet doorCarlson Extra Tall Pet Gate with small pet door $41.68
Pet Patio Door Extra Large White For Aluminum Sliding Door 10.5 in. x 15 in.Pet Patio Door Extra Large White For Aluminum Sliding Door 10.5 in. x 15 in. $133.34 e-Cat Electronic Pet Dog Cat Doore-Cat Electronic Pet Dog Cat Door $89.95
Dog Mate Multi Insulation Dog Door Size Medium (up to 18" Shoulder Height)Dog Mate Multi Insulation Dog Door Size Medium (up to 18" Shoulder Height) $40.99 PetSafe Electronic SmartKey Smart Key for SmartDoor Pac11-11045PetSafe Electronic SmartKey Smart Key for SmartDoor Pac11-11045 $18.90
New listing
		Ideal Pet Products 3-Panel Airseal and Vip DoorReplacement FlapNew listing Ideal Pet Products 3-Panel Airseal and Vip DoorReplacement Flap $42.02 Ideal Pet Products 33Swdxl Replacement Flap For Ultra Flex Large Pet Door NewIdeal Pet Products 33Swdxl Replacement Flap For Ultra Flex Large Pet Door New $30.79
PetSafe Extreme Weather Small Pet Door Ppa00-10984 1-15lbs sized Pets NiobPetSafe Extreme Weather Small Pet Door Ppa00-10984 1-15lbs sized Pets Niob $29.99 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
4 Way Perfect Pet Cat Door Size Small Kitty 5.7" x 6.1" Flap Entry & Exit White4 Way Perfect Pet Cat Door Size Small Kitty 5.7" x 6.1" Flap Entry & Exit White $9.49 Was: Previous Price $9.99 Fast Fit Pet Patio Dog Door - Medium/White Frame 93 3/4" to 96 1/2"Fast Fit Pet Patio Dog Door - Medium/White Frame 93 3/4" to 96 1/2" $311.94
White Brown Cat Dog Pet Kitten 4 Way Flap Door Lock Safe Lockable Lock Door LotWhite Brown Cat Dog Pet Kitten 4 Way Flap Door Lock Safe Lockable Lock Door Lot $9.73 to $34.55 PetSafe Freedom Aluminum Patio Panel Sliding Glass Pet Door NewPetSafe Freedom Aluminum Patio Panel Sliding Glass Pet Door New $140.67 to $197.61
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 $8.99 PetSafe Wall Dual Entry Aluminium Telescoping Pet Door for DogsPetSafe Wall Dual Entry Aluminium Telescoping Pet Door for Dogs $78.99 to $129.90
Pride Replacement Flaps (fits Johnson & Petsafe Ultimate)Pride Replacement Flaps (fits Johnson & Petsafe Ultimate) $49.99 to $99.99 Dog Mate Medium Dog Door WhiteDog Mate Medium Dog Door White $32.00
PetSafe Wall Entry Aluminum Dog Door Double Flap System Small, Medium or LargePetSafe Wall Entry Aluminum Dog Door Double Flap System Small, Medium or Large $59.95 to $109.95 High Tech Pet Wall Adapter Tunnel Wa-1 for Power Pet Px-1 Extension Door MediumHigh Tech Pet Wall Adapter Tunnel Wa-1 for Power Pet Px-1 Extension Door Medium $15.95
New listing
		Ideal Pet Products Ruff-Weather Pet Door Wall Installation Kit 15" x 23.5" FlapNew listing Ideal Pet Products Ruff-Weather Pet Door Wall Installation Kit 15" x 23.5" Flap $24.99 Trending at $36.71 Large Dog Pet Door Magnetic Flap Gate w Lock Out Panel Aluminum Frame Self CloseLarge Dog Pet Door Magnetic Flap Gate w Lock Out Panel Aluminum Frame Self Close $86.39
PetSafe Classic Replacement Flap Large 700-416 Dog Puppy Door Patio 10x15 NewPetSafe Classic Replacement Flap Large 700-416 Dog Puppy Door Patio 10x15 New $24.43 4-Way Lockable Pet Door In/Out for Cats Small Dogs with Telescopic Frame S Ps0714-Way Lockable Pet Door In/Out for Cats Small Dogs with Telescopic Frame S Ps071 $13.76
Medium Dog Door Flap Pet Gate Cat Doggie Safe Wall Entry Patio Enclosure PetSafeMedium Dog Door Flap Pet Gate Cat Doggie Safe Wall Entry Patio Enclosure PetSafe $41.26 New listing
		Ideal Pet Products Aluminum Sash Window Cat Door, WhiteNew listing Ideal Pet Products Aluminum Sash Window Cat Door, White $122.11
Aluminum Pet Door White Super Large Animal Cat Dog Tamper Proof Mount Clear FlapAluminum Pet Door White Super Large Animal Cat Dog Tamper Proof Mount Clear Flap $155.95 New listing
		Large Pet Dog Door Wall Entry Aluminum Insulated Ppa11-10917 To 100lb PetSafeNew listing Large Pet Dog Door Wall Entry Aluminum Insulated Ppa11-10917 To 100lb PetSafe $99.00 Trending at $109.95
Pet Door Replacement Flap Magnetic Closure Soft Tinted Vinyl Medium 8x11 InchesPet Door Replacement Flap Magnetic Closure Soft Tinted Vinyl Medium 8x11 Inches $13.21 Trixie Pet Products 2-Way Locking Dog Door For Medium to X-Large Dogs White 3879Trixie Pet Products 2-Way Locking Dog Door For Medium to X-Large Dogs White 3879 $40.61
New listing
		Pet Door Replacement Flap, Large Pac11-11039 Freedom Dog & Cat Door single FlapNew listing Pet Door Replacement Flap, Large Pac11-11039 Freedom Dog & Cat Door single Flap $13.66 Trending at $16.70 17'x14' Large 4 Way Pet Cat Dog Supply Lock Lockable Flap Door White He8Y Us17'x14' Large 4 Way Pet Cat Dog Supply Lock Lockable Flap Door White He8Y Us $26.33 Trending at $31.90
New listing
		Ideal Pet Products 80" Fast Fit Aluminum Pet Patio Door, Small, 5" x 7" FlapNew listing Ideal Pet Products 80" Fast Fit Aluminum Pet Patio Door, Small, 5" x 7" Flap $129.99 Ideal Pet Products Replacement Flap Plastic Deluxe, Pet Door Extra Large RfxlnIdeal Pet Products Replacement Flap Plastic Deluxe, Pet Door Extra Large Rfxln $24.60
PetSafe Premium Plastic Pet Door White, Large Ppa00-10960PetSafe Premium Plastic Pet Door White, Large Ppa00-10960 $61.95 Sliding Glass Pet Door Aluminum Patio Flap Panel Dog Cat Freedom Large WhiteSliding Glass Pet Door Aluminum Patio Flap Panel Dog Cat Freedom Large White $179.96
Ideal Pet Products 80Patcfw Fast Fit Aluminum Pet Patio Door, 80" NewIdeal Pet Products 80Patcfw Fast Fit Aluminum Pet Patio Door, 80" New $139.01 Pet Patio Dog Door Extra Large White Aluminum Sliding 10.5 x 15 in. Flap IdealPet Patio Dog Door Extra Large White Aluminum Sliding 10.5 x 15 in. Flap Ideal $141.60
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Prices current as of last update, 11/10/17 6:16pm.

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