Los Angeles Cat Behaviorist and Veterinarian Team

Formal Study at Harvard and Oxford University and Founders of the “Cat Behaviorist” Specialty Celebrating 25 Years in Practice

NatGeo Wild’s and Discovery Channel’s Cat Behaviorist Scientifically Solving Your Cat’s Behavior Issues from a Feline Behavior Evolutionary Point of View

“Thanks for all Your Help Mieshelle!” Charlize Theron

The Cat Whisperer California
The Clinic Specializes in Cat Urination, Defecation, and Aggression Behavioral Issues.
  • Important Update: We are currently scheduling in-person, Zoom, or phone appointments with the doctor and behaviorist through November 30th.  For urination or defecation issues, participate in our feline study and receive the reduced consult fee through October 30th. Scheduled cat owners can also participate in Mieshelle’s upcoming National Geographic and Discovery Channel cat behavior show productions.

View Over 350 Testimonials for Solved Cat Aggression, Urination, Defecation, Urine Spray-marking, and Vocalization Disorders

” I 100% recommend Mieshelle!”  Dr. Midori Higashi

Cat Behaviorist from Los Angeles Mieshelle Nagelschneider
Oxford-trained Cat Behaviorist Mieshelle on the Media Tour for Arm & Hammer Cat Litter as the International Cat Expert and Spokesperson for Arm & Hammer.

Schedule a Zoom or Phone Appointment with California Cat Behaviorist and Learn the Importance of Gene-encoded Cat Behavior

Mieshelle studied animal behavior and animal welfare at Oxford University and the University of Edinburgh (Royal School of Veterinary Studies), and is the author of the New York Times acclaimed feline behavior science book published in 4 languages by Random House Publishing.

Founder and director of the clinic, her in-depth scientific analysis of the behavior and evolutionary biology of the cat and her animal behavior study at Harvard University, has enabled her to help thousands of cat owners over two decades and in over 30 different countries, solve their cat’s behavior issues.  Our veterinarians perform vet-to-vet remote consults.  Mieshelle performs consultations in-person in California or remotely by phone or video.

Cat Behaviorist Mieshelle Nagelschneider on Large TV Screen with two cat owners watching
Mieshelle conducting a consultation in Beijing, China via Zoom video 2021.

Scientifically Solving Cat Behavior Issues from a Feline Behavior Evolutionary Point of View

Cat Behaviorist Mieshelle Nagelschneider Cat Behavior Books
Cat Behavior Science Author Mieshelle is published by Random House Publishing in 4 languages (award-winning and New York Times Acclaimed).
37 Wildcat Species Expert for National Geographic

National Geographic

You can also watch Mieshelle on National Geographic’s Animals Doing Things California filming with Howie Mandel as their cat expert and other cat behavior documentaries by Nat Geo Wild.  As a cat behavior science author she is also the cat expert for many of National Geographic’s published works on the 37 species of wildcats, tigers, and every breed of the domestic house cat.  Originally from Los Angeles, Mieshelle is known for her global leadership in cat behavior education helping cat owners and veterinarians from the Philippines to Australia understand cat behavior from a feline biology and evolutionary point of view.  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. 

Mieshelle is the recipient of the Golden Purr Award for her contribution to the science of cat behavior. Her award-winning first ever scholarly-cited cat behavior book (Random House Publishing) for cat owners is published in 4 languages and across 80 countries.  Acclaimed by The New York Times, the book is recommended text for a number of animal behavior certifying organizations. Read more about Mieshelle international cat advocate work and lectures conducted around the world on our cat behaviorist home page.

What Our California Cat Owners Are Saying in Beverly Hills, Santa Monica, San Diego, and San Francisco.

Cat Behaviorist Mieshelle filming in Studio City California for Hallmark Channel



California Cat Behavior Testimonial Update: “I’m already having much success with (behavior plan removed) and all of her stools have been in the box since (behavior plan removed).  Should I send in a picture of a stool covered with litter? How should I handle getting a picture of her stool? I’ll send a photo of her (behavior plan removed) and an update on her behavior to the link. Thanks so much for all of your help.”  Ann H.  Costa Mesa, California 

Please contact the clinic to schedule a phone or video (Skype, Zoom) behavior consultation.  Please visit our home page to begin. Cat Behaviorist Mieshelle Nagelschneider goes beyond the obvious behavior strategies and facts during behavior consultation program.  She has lectured at the international level from Australia to the Philippines at education conventions for veterinarians, the Humane Society/SPCA on all common, but sometimes very complex, feline behavior issues.

“We didn’t know where to begin with our cat’s behavior issues, and the vets never seemed to know what to do either.  Our family is so glad we placed our complete trust in you and are forever grateful to have worked with you.  Thank you for saving our cat, Putters!  Steve R.  Santa Monica, California – Phone Consultation

For over two decades Mieshelle has conducted several thousand cat behavior consultations in over thirty countries.

Cat behavior issues like urination, defecation, aggression and other cat behavior issues are very solvable. Taking into consideration feline evolutionary biology and your cat’s gene encoded behavior (instincts and fixed action patterns) is just one of several components that must be a part of a successful behavior plan that has lasting results.  To achieve this, it’s necessary to work with an experienced cat behaviorist, but most importantly, one with formal study in animal behavior that can apply the sciences of genetics, animal psychology, biology, physiology, learning and memory to effectively correct a cat’s behavior.

“Queen” of the Cat Behavior Specialty, National and International Cat Welfarist, Lecturer, Behaviorist, and Award-winning Cat Behavior Science Author

Los Angeles cat book chat

Media Tour with Mieshelle as the International Cat Behaviorist for Arm & Hammer in Toronto, CanadaRead more about Mieshelle’s national and international media, animal welfare and spokesperson work on the clinic about page. Watch Mieshelle with Howie Mandel on National Geographic’s Animals Doing Things and The Wild Side of Cats, the Today Show, Nat Geo Wild, Animal Planet, Hallmark Channel (and countless others) and her work with Best Friend’s Animal Society, the SPCA, and in Los Angeles for the NKLA (No-kill Los Angeles).

Call the clinic today to learn more or to schedule your consultation at 503-267-8888.

About Cat Behaviorist Mieshelle Nagelschneider in the Los Angeles, California News 
Please visit our clinic Home Page to Learn More and to Schedule.


World-renowned Oxford-trained Cat Behaviorist Mieshelle Nagelschneider, The Cat Whisperer™️

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