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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16' x 21' Extra Large Dog Door Aluminum Pet Door Double Panels Automatic Close16' x 21' Extra Large Dog Door Aluminum Pet Door Double Panels Automatic Close $135.90 14"x20" Aluminum Pet Dog Door Magnetic Flap Locking Screen Wall Gate Entry Frame14"x20" Aluminum Pet Dog Door Magnetic Flap Locking Screen Wall Gate Entry Frame $111.99
New ListingPetSafe Medium Dual Wall Entry Pet Dog Door With Closing Panel Zpa00-16202New ListingPetSafe Medium Dual Wall Entry Pet Dog Door With Closing Panel Zpa00-16202 $64.99 Large Dog Door Weatherproof Aluminum w/ Automatic Closing Double Panels Pet DoorLarge Dog Door Weatherproof Aluminum w/ Automatic Closing Double Panels Pet Door $135.90
4 Way Medium Small Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Frame4 Way Medium Small Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Frame $16.99 Pet Large Dog Lockable Flap Door Magnetic Lock Door Gate Frame for Screen WindowPet Large Dog Lockable Flap Door Magnetic Lock Door Gate Frame for Screen Window $30.35
Dog Door Flaps Doghouse or Kennel Door Flap Pet Products and Supplies Safe NewDog Door Flaps Doghouse or Kennel Door Flap Pet Products and Supplies Safe New $24.91 PetSafe Extreme Weather Pet Dog Doors W/ Triple FlapsPetSafe Extreme Weather Pet Dog Doors W/ Triple Flaps $83.99
FreeStanding Tunnel Adjustable Dog Door with Aviation Aluminum FrameFreeStanding Tunnel Adjustable Dog Door with Aviation Aluminum Frame $36.99 16' x 21' Extra Large Dog Door Double Panels Automatic Close Up to 120Lbs16' x 21' Extra Large Dog Door Double Panels Automatic Close Up to 120Lbs $135.90
4 Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Gate Frame S M L4 Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Gate Frame S M L $16.89 Replacement Dog Door Flap Ruff Weather Pet Cat Metal Extra Large Doors Cats DogsReplacement Dog Door Flap Ruff Weather Pet Cat Metal Extra Large Doors Cats Dogs $31.99
4 Way Locking Pet Cat Puppy Dog Magnetic Flap Door Entry & Exit Safe Gate Frame4 Way Locking Pet Cat Puppy Dog Magnetic Flap Door Entry & Exit Safe Gate Frame $22.85 Trixie natura Vinyl Pet Door Flaps for Large Classic Weather-Resistant Dog HouseTrixie natura Vinyl Pet Door Flaps for Large Classic Weather-Resistant Dog House $12.64
Pet Door Locking Large Dog Cat Door Flap Install in Interior and Exterior DoorsPet Door Locking Large Dog Cat Door Flap Install in Interior and Exterior Doors $17.46 to Large Dog Door with Double Panels, Automatic Closing Panels for Energy EfficientLarge Dog Door with Double Panels, Automatic Closing Panels for Energy Efficient $135.90
Trixie Pet Products 2-Way Locking Dog Door, Medium to X-Large Dogs, WhiteTrixie Pet Products 2-Way Locking Dog Door, Medium to X-Large Dogs, White $43.94 PetSafe White & Durable Plastic Dog Pet Door Multiple Sizes -(Authorized Dealer)PetSafe White & Durable Plastic Dog Pet Door Multiple Sizes -(Authorized Dealer) $49.95 to
4-Way Lockable Magnetic Pet Cat Puppy Dog Safe Flap Door Frame Magnetic Lock4-Way Lockable Magnetic Pet Cat Puppy Dog Safe Flap Door Frame Magnetic Lock $12.95 to Large Doggie Door with Magnetic Locking Panel for Home Security - Durable & WeatLarge Doggie Door with Magnetic Locking Panel for Home Security - Durable & Weat $43.99
4 Way Pet Door Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Frame Abs4 Way Pet Door Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Frame Abs $24.69 PetSafe Freedom Patio 1-Piece Sliding Glass Pet Door Large-adjustable 91-96PetSafe Freedom Patio 1-Piece Sliding Glass Pet Door Large-adjustable 91-96 $199.99
13.25 in. L x 20.25 in. H Extra-Large Plastic Door For Flat Roof Dog House13.25 in. L x 20.25 in. H Extra-Large Plastic Door For Flat Roof Dog House $12.19 Classicmacher Large Dog Door Double Magnetic Flaps Up to 110 lbs (Dull Black)Classicmacher Large Dog Door Double Magnetic Flaps Up to 110 lbs (Dull Black) $74.99
Weatherproof Dog Door with Double Sliding Lock Panel, Energy Efficient RuggedWeatherproof Dog Door with Double Sliding Lock Panel, Energy Efficient Rugged $67.50 Medium Dog Door for Door, Heavy Duty Dog Door with Aluminum FrameMedium Dog Door for Door, Heavy Duty Dog Door with Aluminum Frame $44.95
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 $15.98 to Large Dog Pet Door Replacement Flap Compatible with Petsafe 16 7/8” X 10 1/8”Large Dog Pet Door Replacement Flap Compatible with Petsafe 16 7/8” X 10 1/8” $18.99
Trixie Vinyl Dog Door Flap, Fits 9.4 X 14.2-In Wooden Dog House Opening, ReplaceTrixie Vinyl Dog Door Flap, Fits 9.4 X 14.2-In Wooden Dog House Opening, Replace $10.99 Extreme Weather Aluminum Pet Door - Most Energy Efficient Pet Door - Extra LargeExtreme Weather Aluminum Pet Door - Most Energy Efficient Pet Door - Extra Large $135.00
Cat Flap Door with 4 Way Security Lock Cat Dogs Flap Doors Weatherproof Cat FlapCat Flap Door with 4 Way Security Lock Cat Dogs Flap Doors Weatherproof Cat Flap $11.87 PetSafe 1-Piece Sliding Glass Patio Door with Dog cat Door adjustable all sizesPetSafe 1-Piece Sliding Glass Patio Door with Dog cat Door adjustable all sizes $148.99 to
27"x17" Aluminum Pet Door Dog Cat Magnetic Lockable Flap Screen Gate Extra Large27"x17" Aluminum Pet Door Dog Cat Magnetic Lockable Flap Screen Gate Extra Large $118.99 Pet Door for Cats and Dog, Cat Flap Door for Interior Exterior Cat Door Weath.Pet Door for Cats and Dog, Cat Flap Door for Interior Exterior Cat Door Weath. $13.83Buy It Now
4-Way Small Pet Cat Dog Magnetic Lock Lockable Flap Door Frame Safe Magnetic Abs4-Way Small Pet Cat Dog Magnetic Lock Lockable Flap Door Frame Safe Magnetic Abs $13.00 Weatherproof Dog Door Large Double Sliding Lock Panel Energy EfficientWeatherproof Dog Door Large Double Sliding Lock Panel Energy Efficient $67.50
28"x18" Large Aluminum Pet Door Dog Cat Magnetic Lockable Flap Screen Gate Frame28"x18" Large Aluminum Pet Door Dog Cat Magnetic Lockable Flap Screen Gate Frame $114.90 Weatherproof Dog Door Extra Medium M Double Sliding Lock Panel Energy EfficientWeatherproof Dog Door Extra Medium M Double Sliding Lock Panel Energy Efficient $33.98
Large Dog Door for Sliding Glass Door – Adjustable 78-82 Inches - FantrekLarge Dog Door for Sliding Glass Door – Adjustable 78-82 Inches - Fantrek $90.99 New ListingPet Products 2-Way Locking Dog Door Medium to X-Large Dogs WhiteNew ListingPet Products 2-Way Locking Dog Door Medium to X-Large Dogs White $45.49
Ideal Pet Products Original Plastic Pet Dog Door-All SizesIdeal Pet Products Original Plastic Pet Dog Door-All Sizes $37.75 to 16x21x2in Extra Large Dog Door Aluminum Pet Door Double Panels Automatic Close16x21x2in Extra Large Dog Door Aluminum Pet Door Double Panels Automatic Close $135.90
Dog Door Flap Fits deal Pet Ruff Weather Pet Door, Xl. for Pets 36 to 90 lbsDog Door Flap Fits deal Pet Ruff Weather Pet Door, Xl. for Pets 36 to 90 lbs $10.62 New ListingPetSafe Extreme Weather Pet Dog Door Medium Most Energy Efficient Insulated NibNew ListingPetSafe Extreme Weather Pet Dog Door Medium Most Energy Efficient Insulated Nib $88.98
Dog Cat Magnetic Flap Screen Door Pet Puppy Magnetic Lockable Entry Gate FrameDog Cat Magnetic Flap Screen Door Pet Puppy Magnetic Lockable Entry Gate Frame $25.99 4 Way Black Pet Cat Puppy Dog Lockable Safe Flap Door Frame Magnetic Lock Abs4 Way Black Pet Cat Puppy Dog Lockable Safe Flap Door Frame Magnetic Lock Abs $12.85 to
Extra Large Doggie Door Pet Frame Durable Easy Install Dog Flap Mount SecureExtra Large Doggie Door Pet Frame Durable Easy Install Dog Flap Mount Secure $68.86 Pet Safe Doggie Door easy install for exterior doorPet Safe Doggie Door easy install for exterior door $25.00
Medium Large Dog House Door Flap Vinyl Weather Resistant Clear Rain Snow DurableMedium Large Dog House Door Flap Vinyl Weather Resistant Clear Rain Snow Durable $24.02 Cat Dog Pet Door S-Xl Size Magnetic Adjustable Door Locking Cat Dog Free AccessCat Dog Pet Door S-Xl Size Magnetic Adjustable Door Locking Cat Dog Free Access $11.99 to
Large Medium Pet Dog Cat Door Flap Magnetic Lockable Sliding Screen Gate FrameLarge Medium Pet Dog Cat Door Flap Magnetic Lockable Sliding Screen Gate Frame $21.61 to Dog Pet Door Replacement Flap Compatible With Pet safe 12 7/8” X 8 1/8” MediumDog Pet Door Replacement Flap Compatible With Pet safe 12 7/8” X 8 1/8” Medium $16.01
Dog Door Mat for Muddy Paws, Absorbs Moisture and Dirt, Non-Slip Washable Mat, QDog Door Mat for Muddy Paws, Absorbs Moisture and Dirt, Non-Slip Washable Mat, Q $12.99 4 Way Pet Door Cat Puppy Dog Magnetic Lock Lockable Flap Door Frame Magnetic Abs4 Way Pet Door Cat Puppy Dog Magnetic Lock Lockable Flap Door Frame Magnetic Abs $11.99 to
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Prices current as of last update, 11/29/24 5:27pm.

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