Cat Flap Fever Industries

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The Original and simply the best Custom Cat Door for the Window with Locking Flap. Our standard 6"x6" flap is included and we also offer a larger 8"x9" size for our husky furry friends as well as Microchip.   

Based on 15 reviews
Great service easy order

Thus company is amazing. The ordering was easy and went very smooth from the beginning to the end. VERY quick turnaround. Great communication all the way.
So glad to have found them. I would recommend without a doubt.


I was a little nervous with the measurements but it came perfectly! Also, delivery was quick - highly recommend! If I know anyone in the future who wants one of these, I'll send them your way! Oh, and the cats love it!


I am so happy I decided to order through this site! The customer service is amazing. I am so grateful they follow up with a text to make sure your measurements are correct. The door came perfectly sized! Installed in minutes. I had ordered a pair of the window wedges to lock the window but they weren’t in my package when it arrived. I called customer service and they said they would mail that out right away! I don’t usually write reviews, but I am super impressed by the product and the people! I would definitely recommend!

Well Made and Well Functioning Product

Works well for my needs. Appreciated the online measuring instructions and double check by the company. For my application, I will need to add more weatherstripping but that is simply my choice and not a product defect. Having the ends tapered can be very helpful when inserting into window track. Glad I ordered the large door size; I think it helps a more timid cat feel comfortable using the door. The characters can now head out to their screened porch as they see fit without taking a lot of house heat with them.


It’s the perfect cat flap for my odd window! I looked for some time to install a cat flap rather than letting my cats in and out but I have very odd windows. I was so happy to find this company and they were great to work with! Double checked all the dimensions of my windows and it arrived quickly! Thanks!

Very Pleased!

We love our Cat flap! and so do our 7 cats. We have one that snaps on to our screen and while that is great for summertime and warmer weather we couldnt leave it open in the winter, so problem solved. I was impressed with how strong and sturdy it is and with just 2 weather strips it became air tight. I would highly recommend this product! Also I would recommend going with the larger cat flap. It should e a lifetime purchase and when your cats get older they do plump up. :)

Great Window Cat Flap!

We recently moved house and were worried that our outdoor loving cat would be stressed without door access in the new house. The window cat flap has solved our problems! It fits neatly, can easily be removed if necessary and we received it (in Bermuda) in good time considering the situation regarding Covid. Very efficient and affordable service. Thank you very much! (Tigger likes it too!)

Everything I was hoping for

The title says it all. This product is everything I was hoping it would be. Almost immediately my cat started using it. The quality is great, the plexiglass is just as clear as the window glass, and the fit is perfect. Originally I had mismeasured my window depth and within minutes of submitting my order I received a text message with detailed instructions for proper measuring. Overall my experience has been exceptional.

Quality product and outstanding customer service!

I found this wonderful company googling cat doors for windows. I have a small garden window that I thought would be difficult to find a flap insert for. I was wrong. I was contacted for key details that made the final product a perfect fit. The insert looks so professional, featuring a siding finish that blends in very well with the outside look of the house. Liz was the epitome of the perfect customer service professional. I’m extremely happy with my purchase and plan to order again soon. Semper Fi!

Great product

This cat window insert was a great find! I wanted to build a catio for my indoor-only kitty, but didn't want to punch a big hole in my house and we didn't have an accessible door that would work, so this solution was purrrrfect. The insert arrived quickly and fit the window perfectly. It had one broken locking tab when it came, but I contacted the company and they sent a replacement tab that I was able to easily snap on. I would definitely recommend this product!

Easy to put in and works perfectly.

Plexiglass keeps the light coming in, and it barely shows. Looks so much better than white plastic. The door arrived very quickly after ordering.

Perfect fit

The cat door fit into my window like a glove! It feels and looks really secure - definitely the tight fit I was looking for to keep the northeastern winter weather outside. My cat loves it too.


They helped me measure the window and when the cat door arrived it fit perfectly in the window. Cat loves going in and out to his cattery


Company was great to work with customized our product perfectly!

Great product and amazing customer service

I ordered my cat flap on a Sunday and sent a text with a question and got an immediate answer. They confirmed my measurements by checking some photos I sent and voila! It was in the mail that day. It fit perfectly and the cats are using it!! Just in time for the cold weather too! The PVC version really keeps out the cold air. Me and my 3 cats love it!!