Los Angeles Cat Behaviorist & Licensed Veterinarian
33 Years in Practice

Schedule a Zoom Appointment with Los Angeles Cat Behaviorist and Two-time Academy Award-winning T.V. Show, “My Cat from Hell” New Host Mieshelle Nagelschneider, with 1 Billion Viewers and the Most Watched Cat Behavior Show in the World.

Mieshelle Nagelschneider standing photo behind My Cat from Hell 2 magnifying glass | | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com

Feline Cognitive Rescue Program™ – Expertise for Complex or Severe Behavior Cases

Developed by the clinic, our Feline Cognitive Rescue Program, has been helping cats with complex, chronic, or severe behavior issues achieve long lasting results. In practice 33 years, our team of cat behaviorists and licensed veterinarians ensure that your cat receives expert and comprehensive holistic care beyond conventional cat behavior advice.

Oxford and Harvard-trained, and Los Angeles Cat Behaviorist Science Author. Mieshelle’s Book is Required Curriculum to Certify Other Cat Counselors and Veterinarians You See Online Today.

The First Cat-only Behavior Practice in California with More Cat Owners Purring Than Anyone. Read 350 Testimonials

Have cat dietary questions? Mieshelle is the scientific cat nutrition research expert for the largest cat food company and manufacturer in the world. A Pioneer of the Cat Behaviorist Specialty, Mieshelle is also a New York Times Acclaimed Cat Behavior Science Author (Random House and National Geographic), and New Television Host of the Cat Behavior Show, My Cat From Hell, Celebrating 33 Years in Practice.

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.

Mieshelle Nagelschneider and Vet | The Cat Behavior Clinic | Mieshelle Nagelschneider | Cat Behaviorist


Los Angeles Cat Behaviorist and Cat Behavior Science Author Mieshelle Nagelschneider with Her Partner Who is Also a Veterinarian

Blue Double Quotations | Mieshelle Nagelschneider | Cat Behaviorist
Mieshelle and adult and child seated at table holding cats | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com

Harvard and Oxford-trained Cat Behaviorist Mieshelle on the Media Tour for Arm & Hammer Cat Litter as the International Cat Expert and Spokesperson for Arm & Hammer.  ” I 100% recommend Mieshelle!”  Dr. Midori Higashi

Schedule a Zoom or Phone Appointment with Los Angeles 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. She is also the cat nutrition research and development expert for the largest cat food company and manufacturer in the world.

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.

Mieshelle on a video call with clients | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com

Mieshelle conducting a consultation from Los Angeles to Beijing, China via Zoom video 2021.  Her new cat behavior show, My Cat From Hell, already has 1 billion viewers internationally.

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

Cat Behavior Science Author Mieshelle is published by Random House Publishing in 4 languages (award-winning and New York Times Acclaimed w/co-writer Cameron Powell).

Mieshelle Nagelschneider Books

Book cover of cats | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com
cat sitting on red chair | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com
National Geographic Logo | Mieshelle Nagelschneider | Cat Behaviorist


37 Wildcat Species Expert for 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.

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 (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.

Cat Behaviorist Mieshelle Nagelschneider on Hallmark Channel

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

“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

Image of Book Jacket The Cat Whisperer and a Siamese Cat | Mieshelle Nagelschneider | Cat Behaviorist

Media Tour with Mieshelle as the International Cat Behaviorist for Arm & Hammer in Toronto, Canada

Read 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).

About Cat Behaviorist Mieshelle Nagelschneider in the Los Angeles, California News 

Please visit our clinic Home Page to Learn More and to Schedule.

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

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

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What People Are Saying