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

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Cat Doors & Flaps

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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SureFlap Microchip Pet Door Connect with Hub Bundle No Collar or Tag RequiredSureFlap Microchip Pet Door Connect with Hub Bundle No Collar or Tag Required $225.00 to $279.00 PetSafe Interior 2-Way Locking Cat Door - Indoor Pet Flap - Hides Litterbox o.PetSafe Interior 2-Way Locking Cat Door - Indoor Pet Flap - Hides Litterbox o. $12.88
Petrich Cat Door 4-way Locking Positions. White Small-Width 190mm X 200mm HeightPetrich Cat Door 4-way Locking Positions. White Small-Width 190mm X 200mm Height $9.50 Depets Large Cat Door Outer Size 9.9" x 9.2" 4 Way Locking Cat Flap Door for .Depets Large Cat Door Outer Size 9.9" x 9.2" 4 Way Locking Cat Flap Door for . $26.95
Ideal Pet Products 6 1/4" x 6 1/4" Deluxe Small Cat Door Flap New Sealed WhiteIdeal Pet Products 6 1/4" x 6 1/4" Deluxe Small Cat Door Flap New Sealed White $15.99 Cat door The Kitty Pass Interior Cat Door, Pet Door Hidden Litter BoxCat door The Kitty Pass Interior Cat Door, Pet Door Hidden Litter Box $34.95
Cat Mate 360W Microchip Cat Flap – White with id tagCat Mate 360W Microchip Cat Flap – White with id tag $36.00 Large Cat Door 4 Way Locking Cat Flap Interior Exterior Doors Window Wall 9x9 InLarge Cat Door 4 Way Locking Cat Flap Interior Exterior Doors Window Wall 9x9 In $26.25 Was:  Previous Price $27.63
Brown 4 Way Locking Lockable Pet Cat Puppy Dog Magnetic Flap Door Gate S M LBrown 4 Way Locking Lockable Pet Cat Puppy Dog Magnetic Flap Door Gate S M L $9.89 to $18.99 New In Packaging - Ideal Lockable Cat Flap - 6.25" x 6.25" OpeningNew In Packaging - Ideal Lockable Cat Flap - 6.25" x 6.25" Opening $10.99
Ceesc 4 Way Rotary Locking Cat Door (open Box)(see Details)Ceesc 4 Way Rotary Locking Cat Door (open Box)(see Details) $20.00 4-Way Pet Cat Kitten Magnetic Lock Lockable Flap Door Plastic Gate For Cat Dog4-Way Pet Cat Kitten Magnetic Lock Lockable Flap Door Plastic Gate For Cat Dog $10.52 to $19.89
Cat Hole- Original Cathole Pet Door w/Cleaning / Grooming Brush*Free 2Day ShipCat Hole- Original Cathole Pet Door w/Cleaning / Grooming Brush*Free 2Day Ship $33.89 Petsafe 2 way cat flap small 1-15 lb New in boxPetsafe 2 way cat flap small 1-15 lb New in box $16.00
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 $9.89 to $18.99 Flap Door 4 Way Locking System Pet Door Cat Flap Door small with safety lockFlap Door 4 Way Locking System Pet Door Cat Flap Door small with safety lock $15.90
Catwalk Door Mount Cat Door Gray Or PinkCatwalk Door Mount Cat Door Gray Or Pink $24.95 to $29.95 PetSafe Big Cat Small Dog Door 4-Way Locking White Interior/Exterior Ppa00-11326PetSafe Big Cat Small Dog Door 4-Way Locking White Interior/Exterior Ppa00-11326 $24.50 Trending at $31.95
The Kitty Pass Interior Cat Door Hidden Litter Box Pet Door for Cats up to 21.The Kitty Pass Interior Cat Door Hidden Litter Box Pet Door for Cats up to 21. $50.95 Cute Indoor Kitty Pass Interior Cat Door Hidden Litter Box Pet Door X-largeCute Indoor Kitty Pass Interior Cat Door Hidden Litter Box Pet Door X-large $38.00
PetSafe Screen Door for Dogs & Cats P1-Zb-11PetSafe Screen Door for Dogs & Cats P1-Zb-11 $21.95 Trending at $23.10 (2x) New Cat Pet Flap Door - 4 Way Lock (6.25" x 6.25" Flap Size) Up To 12 Lbs(2x) New Cat Pet Flap Door - 4 Way Lock (6.25" x 6.25" Flap Size) Up To 12 Lbs $15.99
Ideal Pet Products 6 1/4" x 6 1/4" Small Cat Door 4 Way Lock Flap WhiteIdeal Pet Products 6 1/4" x 6 1/4" Small Cat Door 4 Way Lock Flap White $19.95 PetSafe Cat DoorsPetSafe Cat Doors $15.99
4 Way Lock Lockable Pets Flap Door Fit for Dog Cat Medium White Brown4 Way Lock Lockable Pets Flap Door Fit for Dog Cat Medium White Brown $20.13 to $20.76 4 Way Large Pet Cat Puppy Dog Door Flap Locking Lockable Safety Gate L Size Us4 Way Large Pet Cat Puppy Dog Door Flap Locking Lockable Safety Gate L Size Us $18.32 Was:  Previous Price $19.28
PetSafe Tunnel Extension for Microchip Cat Door, Easy InstallationPetSafe Tunnel Extension for Microchip Cat Door, Easy Installation $14.95 4-Way Pet Cat Kitten Small Lockable Safe Flap Door Plastic Gate Pet Cat Dog Gate4-Way Pet Cat Kitten Small Lockable Safe Flap Door Plastic Gate Pet Cat Dog Gate $10.55 to $11.47
Pride Replacement Flaps (fits Johnson & Petsafe Ultimate)Pride Replacement Flaps (fits Johnson & Petsafe Ultimate) $49.99 to $99.99 4-Way Small Pet Cat Kitten Small Lockable Safe Flap Door Plastic Gate Pet Gate4-Way Small Pet Cat Kitten Small Lockable Safe Flap Door Plastic Gate Pet Gate $10.49
Ideal Pet Products ~ Model Spf ~ Small locking Cat Flap~pet doorIdeal Pet Products ~ Model Spf ~ Small locking Cat Flap~pet door $19.99 3852 Tunnel Extender With Rotary Lock for 4-Way Cat Door, White3852 Tunnel Extender With Rotary Lock for 4-Way Cat Door, White $12.80
Purrfect Portal Cat Door for Interior Doors with Grooming Brush ~ New Open BoxPurrfect Portal Cat Door for Interior Doors with Grooming Brush ~ New Open Box $29.50 Was:  Previous Price $36.88 Interior 2-Way Locking Cat Door Home Entry Access Opening up too 15 lbsInterior 2-Way Locking Cat Door Home Entry Access Opening up too 15 lbs $7.64 Was:  Previous Price $8.99
PetSafe 4-Way Locking Indoor Cat Door White P1-4W-11PetSafe 4-Way Locking Indoor Cat Door White P1-4W-11 $20.95 New 4 Way Cat & Pet Entrance & Exit door! 6" space, 8 inch overall! Locking!New 4 Way Cat & Pet Entrance & Exit door! 6" space, 8 inch overall! Locking! $17.99
M 4 Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Gate FrameM 4 Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Gate Frame $14.29 New Small Cat Flap Pet Door 4 Way Lock Indoor Outdoor 12 Pounds Same Day ShipNew Small Cat Flap Pet Door 4 Way Lock Indoor Outdoor 12 Pounds Same Day Ship $19.99
PetSafe big cat/small dog lockable in/out door installation kit,Nip but openedPetSafe big cat/small dog lockable in/out door installation kit,Nip but opened $24.78 New listing
		Depets Large Cat Door Outer Size 9.9" x 9.2", 4 Way Locking Cat Flap Door for &New listing Depets Large Cat Door Outer Size 9.9" x 9.2", 4 Way Locking Cat Flap Door for & $19.80
Sash Style Window Cat Door for 19" to 24" Window WidthsSash Style Window Cat Door for 19" to 24" Window Widths $169.00 Ideal Pet Products 6 1/4" x 6 1/4" Small Cat Door FlapIdeal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap $8.51 Trending at $12.56
Pet Safe 2-way Interior Locking Cat Flapping Door up to 15lbs 5 3/4" x5 3/4" NibPet Safe 2-way Interior Locking Cat Flapping Door up to 15lbs 5 3/4" x5 3/4" Nib $11.15 Trending at $12.74 TheDoorLatch ™ Adjustable Door Latch Door Prop and Strap Baby Gate AlternativeTheDoorLatch ™ Adjustable Door Latch Door Prop and Strap Baby Gate Alternative $24.99
New Ideal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap Easy Install WhiteNew Ideal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap Easy Install White $12.90 Petsafe "Extreme Weather" Pet DoorPetsafe "Extreme Weather" Pet Door $79.99 to $149.99
Pet Dog Cat Screen Locking Flaps Doors Magnetic Screen Automatic Dual Entry NewPet Dog Cat Screen Locking Flaps Doors Magnetic Screen Automatic Dual Entry New $19.99 to $41.99 Cat Mate Large Cat Flap New in Box 221W - White - NewCat Mate Large Cat Flap New in Box 221W - White - New $16.49 Was:  Previous Price $21.99
Perfect Pet Soft Flap Cat Door Telescoping Frame Cats Up To 12 Lb, 5"x7" FlapPerfect Pet Soft Flap Cat Door Telescoping Frame Cats Up To 12 Lb, 5"x7" Flap $23.99 4 Way Lockable Dogs Cat Security Flap Door Kitten Puppy Pets Plastic Gate4 Way Lockable Dogs Cat Security Flap Door Kitten Puppy Pets Plastic Gate $17.73 to $34.38 Was:  Previous Price $18.86
PetSafe 4-Way Locking Interior/Exterior Cat Door Small 1-15lb.PetSafe 4-Way Locking Interior/Exterior Cat Door Small 1-15lb. $29.99 Pet Cat Kitten 4 way Lockable Flap Door Windproof Magnetic Lock Safe Pet DoorPet Cat Kitten 4 way Lockable Flap Door Windproof Magnetic Lock Safe Pet Door $11.50
4 Way Magnetic Lock Lockable Flap Door Pet Gate For Puppy Dog Pet Cat Windproof4 Way Magnetic Lock Lockable Flap Door Pet Gate For Puppy Dog Pet Cat Windproof $11.48 SureFlap Microchip Dual Scan Cat Door White/Brown No Collar or Tag RequiredSureFlap Microchip Dual Scan Cat Door White/Brown No Collar or Tag Required $134.95
PetSafe 2-Way Cat FlapPetSafe 2-Way Cat Flap $11.00 Ideal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap
00006000
 White New box openedIdeal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap 00006000 White New box opened $14.90
Safe Pets Happy Owners Digital Two Meal Feeder New in Box Sale!Safe Pets Happy Owners Digital Two Meal Feeder New in Box Sale! $20.00 Pet Dog Cat Flap Door Wall Mount Magnetic Locking Sliding Screen Round SquarePet Dog Cat Flap Door Wall Mount Magnetic Locking Sliding Screen Round Square $18.99 to $56.04 Was:  Previous Price $19.99
Interior Cat Door Kitty Doors Shaped Hole Pet For And Small Pets, Fits InsideInterior Cat Door Kitty Doors Shaped Hole Pet For And Small Pets, Fits Inside $22.40 Ideal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap White New box openedIdeal Pet Products 6 1/4" x 6 1/4" Small Cat Door Flap White New box opened $4.00
Pet Mate Cat Compatible Id Tag for Cats with poorly placed, or no microchipsPet Mate Cat Compatible Id Tag for Cats with poorly placed, or no microchips $8.00 Depets Large Cat Door - no magnetDepets Large Cat Door - no magnet $5.99
Framed Perfect Pet Cat Door Magnetic Soft Flap 7 In x15.25 In Cats up to 25 lbs.Framed Perfect Pet Cat Door Magnetic Soft Flap 7 In x15.25 In Cats up to 25 lbs. $27.00 Sureflap microchip cat flapSureflap microchip cat flap $21.00
Cat Door Window Insert. Made with solid Pvc base and locking flap. Order yours!Cat Door Window Insert. Made with solid Pvc base and locking flap. Order yours! $119.99 Lynx Cat Door, One way, Two Way, Lock SettingsLynx Cat Door, One way, Two Way, Lock Settings $25.99
SureFlap Microchip Pet Door White/Brown - Use MicroChip Or Tag IncludedSureFlap Microchip Pet Door White/Brown - Use MicroChip Or Tag Included $179.95 Adjustable Door Strap and Latch. Cat Door for Interior Door. Dog Proof LitterAdjustable Door Strap and Latch. Cat Door for Interior Door. Dog Proof Litter $19.08
4-Way Pet Cat Puppy Dog Lockable Safe Flap Door Pet Door Pet Gate Supplies Abs4-Way Pet Cat Puppy Dog Lockable Safe Flap Door Pet Door Pet Gate Supplies Abs $12.98 4 Way Magnetic Lock Lockable Safe Flap Door Large Pet Cat Puppy Dog Samger4 Way Magnetic Lock Lockable Safe Flap Door Large Pet Cat Puppy Dog Samger $18.99 Was:  Previous Price $19.99
SureFlap Sure Pet Compatible Id Tag for Cats with poorly placed, or no microchipSureFlap Sure Pet Compatible Id Tag for Cats with poorly placed, or no microchip $8.00 SureFlap Microchip Cat Flap. Car SoorSureFlap Microchip Cat Flap. Car Soor $69.99
PetSafe Big Cat/Small Dog Pet Door up to 25 lbs For Doors and WindowsPetSafe Big Cat/Small Dog Pet Door up to 25 lbs For Doors and Windows $23.00 PetSafe Small 2-Way Cat Door – manual lock, opened box but unusedPetSafe Small 2-Way Cat Door – manual lock, opened box but unused $7.50
Nos Vintage Staywell 6 Pet Door England Cat Door (Light Box Wear)Nos Vintage Staywell 6 Pet Door England Cat Door (Light Box Wear) $27.99 PetSafe Installation Adapter for cat door flap windows walls and metal doors NibPetSafe Installation Adapter for cat door flap windows walls and metal doors Nib $12.00
4 Way Lock Lockable Pets Flap Door Fit for Dog Cat Small without Tunnel4 Way Lock Lockable Pets Flap Door Fit for Dog Cat Small without Tunnel $13.32 PetSafe Microchip Cat Flap - White 4-Way Lock Easy Program Cat Door Ppa19-16145PetSafe Microchip Cat Flap - White 4-Way Lock Easy Program Cat Door Ppa19-16145 $56.00
New listing
		Petrich Cat Door Small Brand New With Screws -ANew listing Petrich Cat Door Small Brand New With Screws -A $8.60 HeftyPet Cat/Dog Door Size 7 1/2" x 10 1/2"HeftyPet Cat/Dog Door Size 7 1/2" x 10 1/2" $23.99
PetSafe 2 Way Interior Cat Door Small 1-15lbsPetSafe 2 Way Interior Cat Door Small 1-15lbs $15.95 New listing
		Staywell 31 Cat Flap Battery PoweredNew listing Staywell 31 Cat Flap Battery Powered $35.00
Sureflap microchip pet doorSureflap microchip pet door $75.00 New listing
		Sure Petcare Hub Wireless control for SureFlap Microchip Pet Door Connect IhbwtNew listing Sure Petcare Hub Wireless control for SureFlap Microchip Pet Door Connect Ihbwt $50.00
4-Way Locking Big Cat Door4-Way Locking Big Cat Door $15.00 Ideal Pet 6.25 in. x 6.25 in. Small pet Flap Door with Plastic Frame (P1)Ideal Pet 6.25 in. x 6.25 in. Small pet Flap Door with Plastic Frame (P1) $33.32
2 way interior cat door2 way interior cat door $9.99 PetSafe ~ 2-Way Cat Indoor Flap Door Cat Up to 15lbs locksPetSafe ~ 2-Way Cat Indoor Flap Door Cat Up to 15lbs locks $12.99
20*19cm 4 Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Gate Frame20*19cm 4 Way Pet Cat Puppy Dog Magnetic Lock Lockable Safe Flap Door Gate Frame $14.29 PetSafe Cd10-050-11 2-Way Interior Cat Door Small 1 lb - 15 lb NewPetSafe Cd10-050-11 2-Way Interior Cat Door Small 1 lb - 15 lb New $16.95
Sure Petcare Microchip Cat Flap Connect and HubSure Petcare Microchip Cat Flap Connect and Hub $150.00 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 $9.48 to $18.04 Was:  Previous Price $9.98
New 10” X 8” Screen Pet Door Fits All Door And Window Screens With InstructionsNew 10” X 8” Screen Pet Door Fits All Door And Window Screens With Instructions $24.99 PetSafe 4-Way Locking Cat Door w/Tunnel White Interior/Exterior Ppa00-11325PetSafe 4-Way Locking Cat Door w/Tunnel White Interior/Exterior Ppa00-11325 $38.95
New listing
		The Kitty Pass Interior Cat Door Hidden Litter Box Pet Door for Cats up to 21 lbNew listing The Kitty Pass Interior Cat Door Hidden Litter Box Pet Door for Cats up to 21 lb $39.99 Electronic E-Cat Door No Collar or Pendant Ideal Pet Products Selective EntryElectronic E-Cat Door No Collar or Pendant Ideal Pet Products Selective Entry $29.99
Cat Walk Multi-Magnetic Cat DoorCat Walk Multi-Magnetic Cat Door $36.00 New listing
		Ideal Pet Products Hefty Kat Large Cat Door 7 1/2" x 10 1/2" Cats up to 25lbsNew listing Ideal Pet Products Hefty Kat Large Cat Door 7 1/2" x 10 1/2" Cats up to 25lbs $19.95
Sure Petcare Rfid Collar Tags 2 pack Col001. Sure Flap Sure FeedSure Petcare Rfid Collar Tags 2 pack Col001. Sure Flap Sure Feed $18.00 Petsafe 2-Way Interior Cat Door Up to 15 lbs New Nip NicePetsafe 2-Way Interior Cat Door Up to 15 lbs New Nip Nice $8.45 Trending at $12.90
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Prices current as of last update, 02/27/21 9:57pm.

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