Select Page

Our CATHOLE® Products

Cat Door with a Brush

 Made in America Patent #5,458,088


The purpose of CATHOLE is to help you hide kitty’s litter box behind a closed inside door.  It installs easily in a basement, laundry room or spare closet door.  With the door closed, kitty can get to the litter box while dogs and toddlers are locked out.

The messy litter box is also isolated from the home “living space” providing a much improved environment for the family and guests.  Many families also used CATHOLE to keep their dogs away from the cat food.

Our experience is that 99% of all cats can easily get through this cat door.  However, if you have a very large cat, send us an email at and we will help you make your decision. 

CAT Safety

Many cat owners are concerned about the safety of their cats and do not let them go outside. There are numerous articles written about the hazards that cats can experience when allowed outside. The Humane Society addresses this issue ………….

“There’s a fairly simple solution to the problem of cats getting themselves into trouble, as well as killing and injuring wildlife: Keep them indoors. In recent decades, the U.S. has experienced a welcome shift in this direction. The proportion of owned cats kept entirely in the house rose from 56 percent in 1998 to 64 percent in 2008, according to a survey by the American Pet Products Association. Still, a significant number continue to wander … Keep cats inside for their own safety … “

CATHOLE is a unique cat door that is designed for those owners who are concerned about this safety issue and keep their cats inside.

Attractive & Easy

CATHOLE has attractive arch frames.

The CLASSIC model, introduced in 1999, has furniture quality baltic birch frames. The wood frames can be painted or stained to match most any décor.  (Many CLASSIC models have been stained to match oak doors.)

Over 80,000 of the CLASSIC models have been sold and we have received very positive feedback from our customers. 

The ECO model, introduced in 2020, has very attractive molded plastic frames and a new molded rubber brush.

Both models have removable brushes that groom kitty and collect loose cat hair. The brushes snap in and out easily for cleaning.

These cat doors install easily.

Many of our customers also comment on the fact that CATHOLE comes with complete easy-to-follow instructions.


The BRUSHES we use are very durable. However, we have had a few customers ask for replacements of their Classic brush. (Some dogs chew on the brush).

We offer a brush-set of two brushes (CLASSIC bristle & ECO rubber) for $30.  You get to try both.

(this includes FREE USPS Priorty Mail shipping).

email us at to request replacement brushes.

Our Company

We want our customers to be delighted with the usefulness, quality & appearance of their cat door.


It all started in 1992. We, like many cat owners, wanted to put our cat’s litter box in the basement.  We didn’t want to leave the door open. So we made a cat door by cutting a small arch-shaped hole in the door. This worked fine, but we didn’t like the appearance and Motchka’s loose hair was constantly collecting on the edge of the hole.

We made a pair of arch-shaped wood frames to cover the hole and painted them.  We then looked for a way to fill the void between the frames and decided that a brush would be the ideal choice.  It would collect loose cat hair efficiently and would help keep our house cleaner.

We decided ‘CATHOLE’ would be a good name for our cat door because it resembled a large mouse hole.  The name became the butt (excuse the pun) of many jokes by our friends.  Regardless, we liked the name and have had it trademarked.  CATHOLE became a conversation piece. “Why don’t you patent it?” We received our Patent in 1995.

This was only the beginning of a long voyage.  Even though our sales are doing quite well, we are still a “mom and pop” company.  Our company has become a major effort for us – after we retired.  On January 1, 2022, our son Dan took over the CH Enterprise, LLC.



There are many costs that must be managed.  However, none is as difficult to foresee and manage as the cost-of-sales.  It is easy to get a handle on development, engineering and even manufacturing costs.  High costs-of-sales can easily leave you selling at a loss!  While most of corporate America has faced this in the past few years, and much has been written, it does not hit home until you try to sell your product at a profit.

Our experience may help some of you who are thinking about starting a small business.  We suggest you give a lot of thought to cost-of-sales – both dollar cost and time (your time) cost.  Experts say that the mortality rate for small businesses is very high.  We suspect that most of these failures result from underestimating the cost of sales.  We have met many inventors and would-be entrepreneurs.  Many of these people think that all you need is a superior product or service, and it will sell itself.  Not true for us (and probably not true for most others).  Additionally, many small businesses may fail because too much emphasis is placed on obtaining venture capital?  Once this money is available, it can easily be gambled away on marketing efforts that provide questionable return.

We chose to boot-strap our growth with our early profits – a very conservative approach.  This cautious approach hasn’t made us rich.  However, it is helping us achieve sustained growth.  This should lead to long-term success.

Since we were the first CAT DOOR on the market, we received number one rankings under GOOGLE and other search engines.  This supported our early “direct ship” fulfillment.

We started selling wholesale in 2005.  We began selling on AMAZON in 2006.  Our sales continue to grow dramatically.

Our Patent expired and we were no longer the only CAT DOOR.  A few companies picked up our concept and imitated our design. They also manufacture there imitation products offshore. With low development cost and offshore manufacturing, they produce a product at a small fraction of our cost.  This enables them to use their extremely high margins to leverage various aspects of e-commerce marketing.  They buy e-commerce visibility that we, as an American based company, cannot afford.  We join thousands of “MADE in USA” companies that face this challenge.

Our “old fashion” marketing is heavily dependent on satisfied customers telling friends.


Our cat door has gone through four major design changes.  The initial design was fine for our use – but it had too many nonstandard parts and was too difficult to install.  So we simplified it.

In our second design, we were making the wood frames from solid wood blanks.  These met our aesthetics criteria, however, they were not strong enough.  We introduced Baltic Birch frames to address this quality issue.  Furniture-grade Baltic Birch is attractive, can be painted or stained and is very strong and durable.

Our third design change resulted from a supplier problem.  We were using a brush made by a large company.  Rubbermaid Corporation, a very large company, bought this company out and decided to discontinue the brush line we had been using.  We weren’t (and still aren’t) big enough for Rubbermaid to care about our business.  So, after a country-wide search, we found a very stable, high-quality family-owned brush manufacturer in Vermont.  This whole painful experience turned out to be a real blessing.  Our new brush is perfect and our new supplier is a delight to work with!

Some of our customers asked for white frames.  We added our new ECO product with the frames made of attractive molded white plastic and a molded rubber brush.  We made this design change in 2020 and added this very popular product.


We started our business by selling online through our website.  Then AMAZON came along – then Chewy, etc.  We learned that these powerhouse marketing companies had a lot to offer. Direct sales has a larger profit margin.  However, much of our business today is wholesale to these marketing giants…………..

Challenges in Running a Small Business

There are an endless number of challenges in making a small business profitable.  As long as we can continue to learn from these challenges (without going broke), the business will continue to be fun. We started out by reading everything we could get on small businesses, attended small business consulting classes, and used local resources such as an Inventor’s Club and SBA. The real lessons, however, were learned first-hand. We learned the cost of making design changes – obsolete inventories, rework, etc. We learned how difficult (and important) it is to find good suppliers. We also learned that the real work begins when you try to market your product.

100% Made in Michigan

All of our CLASSIC model, except the brush, is made in Michigan. Justman Brush in Omaha, NE makes our custom “fused brush”. 

100% of the ECO Model is made in Michigan and we are happy to say that we were able to launch this product in 2020! ………..

The Product was Designed in Waterford, MI

The Design Engineering was done in Clarkston, MI

The 3D Printing for Prototyping was done in Oxford, MI

The Product testing was done in Waterford, MI

The CNC cutting of Injection Molds was performed in Lapeer, MI

The plastic parts are molded in Lapeer, MI

Our boxes are fabricated in Roseville, MI

Our assembly, packaging, and shipping is done in Dearborn, MI

Our marketing and administrative work is done in Dearborn, MI


Many businesses, large and small, go “off-shore” for manufacturing.  We could probably reduce our manufacturing cost by 40%, by outsourcing our manufacturing. However, we will not make this move. We like having high-quality American suppliers and will continue to do our little bit to support manufacturing in America.

Many of our customers install this cat door in a very visible location. We have seen them in basement and laundry room doors that are adjacent to kitchens and main hallways. A lot of people have told us they really like the wood frames.  Our PHOTOS page shows the many different ways our customers paint and stain the wood frames.  Some of the stained and varnished frames are spectacular!  We have continued to make our wooden frames from high quality Baltic Birch and ship them unfinished.

Some of our customers have asked for white frames.  So we added our new ECO product with the frames made of attractive molded white plastic.

Customer Satisfaction

Another principle that we learned is that “customer satisfaction” is everything.  We encourage our customers to let us know what they think of our product and service.  We get lots of questions and feedback on our cat door.  This helps us to continue to focus on what is important to our customers.  We have adopted a number of these suggestions over the years.  A customer suggested that we become a PAYPAL merchant.  Another suggested that we establish an easy way for customers to order replacement brushes.  In Oct. 2010, a customer suggested that we include a PDF copy of the frame outline and hole cut-out template on the website.  Customers have also helped us determine the most important key words to use for search engine optimization.

A whole new paragraph needs to be written about “social networking”.  We are just beginning to learn about the many techniques and tools that are emerging.  Some of these are extremely powerful – especially when you have a very popular product.  Our friend Caren has included us in her blog    “Cat Chat with Caren and Cody”  This is only the beginning of our “social networking” efforts.

Another friend, Tamar, has an interesting blog about being a 30-something single female cat owner in NY City.  Tamar’s blog is “I HAVE CAT” 

My wife Carol & I really enjoy running this little company!  It is very satisfying to hear from happy customers. We are delighted that a significant number of our customers hear about us from their friends!

We welcome any comments you may have regarding improving our product or improving the visibility of our product on the internet.

Hope you have enjoyed this little history of our cat door company.


We have been working on a new product for owners of Electric Vehicles – the Plug-In versions.  This product will be available in May 2022


EV Cable Glide