About Cat Behavior

Mieshelle Nagelschneider is a Harvard-trained cat behaviorist, author, and cat welfarist. She is known for her global leadership in cat behavior education. Her passion and curiosity about cats along with her formal study in animal behavior, continues to put her on the forefront of cat behavior knowledge crossing the conventional boundaries of the cat behavior specialty.

Before you choose a behaviorist we recommend you compare education background and even testimonials. We have more testimonials than any other cat behaviorist since 1999 (or 2018).


Our team also includes a licensed vet and Certified C.A.T. Behavior Consultant all with formal education in animal medicine or behavior.

The Cat Behavior Clinic is a unique organization devoted to both researching and solving cat behavior problems. The clinic opened in 1999 and now serves satisfied clients all over the world conducting phone or video Skype behavior consultations (see hundreds of happy cats in our Rave Reviews) . The Cat Behavior Clinic was founded by Mieshelle Nagelschneider, a nationally known veterinarian-referred certified cat behavior counselor who studied animal behavior at Harvard University.

Mieshelle is a long time member of The Cambridge Center for Behavior Studies, The Animal Behavior Society, the Association of Animal Behavior Professionals, and the International Association for Animal Behavior Consultants. She has dedicated 20 years to consulting with cat owners around the world to solve their cats’ behavior problems. The clinic performs behavior studies and have provided science-based Cat Whisperer® behavioral consulting services to thousands of cats worldwide.

the C.A.T Plan

The Cat Behavior Clinic has exclusive rights to Mieshelle’s proprietary C.A.T. Plan™ Cat Behavior Wellness Program, the most effective, comprehensive, and up-to-date cat behavior wellness program for curing the most common cat behavior problems.  Mieshelle has spent 20 years developing a method so effective that clients who follows it are typically seeing a success rate of more than 90%.  Success rates are even higher for issues that have not been chronic and habituated over years.


Achieving the impossible

Through word-of-mouth and satisfied clients as well as our work with wild cat sanctuaries, national and international humane societies, SPCA’s, veterinary practices, and national and international shelters (including Best Friend’s Animal Society), The Cat Behavior Clinic has become renowned in the field and especially at solving the so-called “unfixable” cat behavior issue.  See our  Media Room for national and international media recognition.

Many people will tell you that it’s impossible to train or otherwise change the behavior of a cat.  But over the last two decades the clinic has successfully applied a method consisting of compassionate awareness (specifically, your cat being a descendant of the African wildcat) and a three-part behavior modification cat behavior wellness program to help resolve the unwanted behaviors of thousands of cats, and we’re here to show cat lovers that cats’ behavior can be reliably and consistently changed for the better.  And we’ll show you exactly how using the uniquely effective three-stage method of solving every one of the seven major cat behavior problems.

We deal with the most extreme behavior issues in cats, as well as everyday problems like aggression, spraying, and litter box issues—problems that cause millions of cats to be surrendered to shelters every year.  In the U.S. there are 88 million households that include one or more cats and virtually every one of those cat owners has at some point dealt with feline behavior that drove them nuts.  And the truth is, almost every cat behavior problem is solvable.  If a cat is placed in an environment that falls in line with his natural cat instincts and is conducive to his happiness, everything will fall into place (yes, even the way you desire).  Otherwise, his unwanted behaviors (which are instinctual) will surface.  It all depends on the surrounding circumstances for each cat.

Our Philosophy

Cats are not like dogs. They are also not like humans. All cat behavior consulting has to start with this awareness. That’s because nearly all failed efforts to modify cats’ behavior assume that cat psychology is like dog psychology (or worse, like human psychology). These efforts are doomed to fail because they are based on ignorance of the uniqueness of individual cats and instinctual colony behavior dynamics. Certified Cat behavior specialists Mieshelle Nagelschneider and Dr. Jim Shultz DVM are here to help you.