Cat Behaviorist Mieshelle Nagelschneider In My Cat From Hell 2 Standing behind a large Magnifying glass | Mieshelle Nagelschneider | Cat Behaviorist |

Founders of the Cat Behaviorist Specialty: Licensed Veterinarian and Cat Behaviorist Team. 350 Five-star Clinic Reviews and 33 Years in Practice.


With 2-time Academy Award-winning Show “My Cat From Hell” Discovery Plus Host and Cat Science Author, Mieshelle Nagelschneider.

Cat Specialists 33 Years in Practice Providing Licensed, Experienced, and Comprehensive Science-based Behavior Care Based on Your Cat’s Feline Evolutionary Biology.

Dedicated to the Scientific Research of Cat Aggression, Urination, Defecation, Spraying, and Vocalization Issues.

Cat Behaviorist Mieshelle Nagelschneider In My Cat From Hell 2 Standing behind a large Magnifying glass | Mieshelle Nagelschneider | Cat Behaviorist |

Founders of the Cat Behaviorist Specialty: Phi Zeta Veterinarian & Oxford-trained Cat Behaviorist Team 350 Five-star Clinic 33 Years in Practice.

From Our Cat Behavior Specialist Team: “Think You’ve Tried Everything to Solve Your Cat’s Issue? We’re Pretty Sure You Haven’t!”

Mieshelle Nagelschneider with Veterinarian | Mieshelle Nagelschneider | Cat Behaviorist

OXFORD University, Harvard University, and The Royal School of Veterinary Studies at The University of Edinburgh was Certified Cat Behaviorist™ and cat science author Mieshelle Nagelschneider’s formal study of animal behavior. Dr. Brad is a Phi Zeta licensed veterinarian. Mieshelle’s cat behavior science book published in 4 languages is text book curriculum to certify other cat behaviorists around the world. You can learn more about her additional animal behavior studies including Harvard University on our Animal Behavior Study Page. Founder of the “cat behaviorist” profession for over two decades, she is world-renowned for her global leadership in cat behavior education and crossing the conventional boundaries of the cat behavior specialty.

Mieshelle is the host of the most watched cat behavior show in the world, My Cat From Hell, (international version 2021 and 2022) with over 1 billion viewers internationally. As the founder of The Cat Behavior Clinic, she and the veterinary team have been analyzing cat behavior and solving their issues in over 30 countries. Mieshelle is the founder of the first cat-only behavior clinic practice in the United States. Her applied scientific analysis of the behavior and evolutionary biology of the cat has enabled her to help thousands of cat owners over two decades, solve their cat’s behavior issues. Our veterinary team is also an integral part of helping cat owners and offer vet-to-vet consulting and local in-home consults.

Mieshelle has been the cat behaviorist and long time research expert for National Geographic and NatGEO Wild television shows, published works and documentaries on cat behavior and the 37 species of wildcats including the domestic cat and wildcat hybrids. You can also watch her on the Today Show, Hallmark Channel, NBC Dateline, and MTV. She is an award-winning international author of New York Times acclaimed feline behavior science book published in 4 languages by Random House Publishing.

Mieshelle coined the term and was the first “Cat Behaviorist” in the United States and is the recipient of the Golden Purr Award for her contribution to cat behavior. To achieve behavior results that are lasting, it’s necessary to work with an experienced cat behaviorist, but most importantly, one with formal university study in animal behavior that can apply the sciences of gene-encoded behavior, animal psychology, feline evolutionary biology and physiology, to effectively correct a cat’s behavior.

Cat Behaviorist Mieshelle Nagelschneider on The Hallmark Channels Home & Family | Cat Behaviorist

Our Cat Behaviorist Team Has Corrected Thousands of Urination, Aggression, Defecation, and Vocalization Cat Behavior Issues in Over 30 Countries Around the World

New York Times Acclaimed Cat Science Author and Cat Behaviorist™ Mieshelle Nagelschneider Featured In:

Home and Family Hallmark Channel Logo | Mieshelle Nagelschneider | Cat Behaviorist
Today Default Social Tease | Mieshelle Nagelschneider | Cat Behaviorist
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Readers Digest Magazine Cover with a Grey Cat | Mieshelle Nagelschneider | Cat Behaviorist
Martha Stewart Living Omnimedia Logo | Mieshelle Nagelschneider | Cat Behaviorist
Nat Geo Wild Wallpaper | Mieshelle Nagelschneider | Cat Behaviorist
Real Simple | Mieshelle Nagelschneider | Cat Behaviorist
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CTV News Channels | Mieshelle Nagelschneider | Cat Behaviorist
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Over 350 Cat Behavior Testimonials – Our Clinic Has More Cats Purring Than Anyone

The Clinic Helps Cats in Over 30 Countries

For Over Three Decades our Cat Behaviorist ™ and Veterinarians at The Cat Behavior Clinic Have Helped Cat Owners Nationwide and in Over 30 Countries Around the World. We Have More Cat Behavior Testimonials Than Anyone From New York to Australia and helped 125 million more cat owners thanks to Mieshelle’s International Cat Behavior Show, My Cat From Hell, with Discovery Channel.

Founder of the “Cat Behaviorist ™” specialty, Mieshelle is a noted international cat behavior science author published in 4 languages for Random House Publishing. Her award-winning scholarly-cited cat behavior book is based on cat and animal behavior scientific research and is the first of its kind for cat owners. She is also a long-time cat behavior expert, editor, and developer for National Geographic books and television documentaries on the 37 species of wild cats (including the domestic house cat). You can also see her as the cat behaviorist expert for Nat Geo WILD’S Animals Doing Things with Howie Mandel.

Mieshelle travels the globe from Australia to the Philippines lecturing to veterinarians and shelter workers to help them better help cat owners for over two decades solving “unfixable” behavior issues. She goes beyond the obvious facts about cat behavior and offers intelligent and proven solutions. Cat owners receive systematic behavior plans and guidance based on feline evolutionary biology.

Cats are still the most misunderstood companion animal that are at the greatest risk. The hundreds of vets the clinic works with each year and who refer cats to us often say, as will vet behaviorists, “we still don’t know what to do with cats”. Dr. Jordan Carlton Schaul, Ph.D., contributing editor, National Geographic, and past curator, Orange County Zoo, “The reason people are so mesmerized by house cats is because they are truly miniature versions of lions, tigers, and leopards. In her book, Mieshelle Nagelschneider explains the behavior of the house cat in an unprecedented and most accessible way, offering unique insight into the often misunderstood companion animal that is as wild as we have become civilized”.

All Three Cat Behavior Books The Cat Whisperer Mieshelle Nagelschneider | Cat Behaviorist
Outlined Image of Cat Tree | Mieshelle Nagelschneider | Cat Behaviorist

Cat Behaviorist™ Organizations and Affiliations

Mieshelle Nagelschneider Cat Behavior Expert for LIFE Magazine on the History of Cats and Their Gene-encoded Behavior

The Cat Whisperer Mieshelle Nagelschneider holding Life Magazine cat edition 2019

Mieshelle as The Cat Whisperer for National Geographic and Discovery Channel and Discovery Channel China

Watch Mieshelle on National Geographic’s Animals Doing Things with Howie Mandel as their cat expert and other cat behaviorist documentaries by Nat Geo Wild. As a cat behavior science author she is also the cat expert for several National Geographic published works on the 37 species of wildcats, tigers, and every breed of the domestic house cat including wildcat hybrids. She is currently filming her new cat behavior show in Beijing China, My Cat From Hell, for Discovery Channel.

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 at the forefront of cat behavior knowledge crossing the conventional boundaries of the cat behaviorist specialty. She is also known as the original and only, Cat Whisperer™.

Darrel P. United States

Watch The Cat Whisperer™ on the Today Show

Two Women and a Man with Two Cats on The Today Show with Cat Behaviorist Mieshelle Nagelschneider
Image of Mieshelle Nagelschneider with Two Women and a Ktten on a couch and The Cat Whisperer Book on display 2 | The Cat Behaviorist

Award-winning Author and Cat Whisperer ™ Mieshelle Nagelschneider – Pioneer of The Cat Behaviorist Specialty Since 1999.

Hallmark Channel Home & Family Show 2017 Mieshelle (center) Talking Cat Behavior Issues with Host and Susan Lucci as the International Cat Behaviorist for Arm & Hammer Cat Litter

Read more about Mieshelle’s past formal education in animal behavior through Oxford University, The University of Edinburgh – The Royal School of Veterinary Studies, and her study and experience at Harvard University on our about page. We also have a licensed veterinarian, Dr. Jim Shultz, that we refer for specific local cases only or vet-to-vet remotely.

Tabby Cat held by a Veterinarian in The Cat Behavior Clinic | Mieshelle Nagelschneider | Cat Behaviorist

Dr. Jim a with a furry patient and cat behavior science cat book featured author

Without a behavior plan that’s carefully created drawing from current research on cat behavior to appropriately address all the critical components and factors of a presenting behavior, is like trying to conduct a symphony without sight or sound. Behavior plans that completely eliminate a cat behavior issue are not one-size-fits-all.

After your consultation should any changes or additions need to be applied to your cat’s behavior plan, we are here for additional correspondence. Cats are not all the same and can respond differently to various techniques and a behavior plan should respond and reflect your cat’s uniqueness.

The Cat Whisperer Book about Cat Behavior with a Cat | Cat Behaviorist

For Over Three Decades the Clinic Has Provided Trusted and Proven Behavior Solutions and is the Author and Cat Expert of Several Cat Behavior Books

“The reason people are so mesmerized by house cats is because they are truly miniature versions of lions, tigers, and leopards. In her book The Cat Whisperer, Mieshelle Nagelschneider explains the behavior of the house cat in an unprecedented and most accessible way, offering a unique insight into the often misunderstood companion animal that is as wild as we have become civilized.”—Jordan Carlton Schaul, Ph.D., contributing editor, National Geographic, and curator, Orange County Zoo

With the help of veterinarian Dr. Gary Weitzman and cat behaviorist Mieshelle Nagelschneider, kids will also learn how to choose the right cat for them, how to take care of their new feline friend, and how to understand its behavior.

picture of grey cat on Cat Tales book cover | Mieshelle Nagelschneider | Cat Behaviorist |

Other National Geographic Works with Cat Behaviorist ™ Mieshelle Nagelschneider.

Recent New and Articles

Frequently Asked Questions

All cat behavior solutions must take into consideration feline instincts and their evolutionary biology. The clinic has exclusive rights to Mieshelle Nagelschneider’s proprietary Cat Whisperer™ consulting, easy-to-implement C.A.T. Plan™ positive behavior modification, the most effective, comprehensive, and up-to-date system for curing any cat behavior problem.

Because every cat and environment is different, the plan allows for customized behavior techniques and environmental changes when needed – because cat behavior is not one-size-fits-all. Mieshelle has spent 20 years developing a method so effective that when clients follow it, their success rate is well over 90% (even higher for the most common issues).

Her science-based cat behavior book, The Cat Whisperer, has been featured in the New York Times and a best-seller on Amazon and published in 4 languages (Random House Publishing with co-writer Cameron Powell).

For cat behaviorists seeking certification, her book is a required curriculum by a number of cat behaviorist certifying organizations.

Love is born of mystery, and our cats are mysterious and loved in equal measure. But sometimes the greatest blessing of all is a bit of light thrown into a dark place. Mieshelle Nagelschneider holds that light. Allow her to share it with you.”– Gwen Cooper Author, Homer’s Odyssey: A Fearless Feline Tale, of Life With a Blind Wonder Cat (Random House), New York, NY

Veterinarian: “Over the course of many years, Mieshelle has developed and refined her unique ability to think like a cat. On numerous occasions I have witnessed the life-changing benefits Mieshelle’s techniques can bring to cats and their sometimes very frustrated owners.” – Veterinarian, Dr. James R. Shultz DVM, Portland, Oregon

Cat Behavior Veterinarian Referral from Dr. Lisa Berger DVM: “Despite all the disruptions, there have been no incidents of urination on the bed or the couch, and neither have been covered by plastic all week!” – Juanita H. Portland, Oregon

You have the African wildcat, your domestic cat’s ancestor, to thank for many of your cat’s “unwanted” cat behaviors. Learn more about this during your consultation to better understand and help your cat and solve its behavior issues. We often misunderstand cat behaviors. Once cat owners understand their cat instincts and biology, they can better understand why the behavior strategies work so well and can better apply them.

Mieshelle The Cat Whisperer™ has been the spokesperson and cat behavior expert for Comfort Zone, Arm & Hammer Cat Litter, and Cat Expert for Whiska’s International Media Tour Australia. Her cat behavior expertise is seen in the New York Times, The Today Show, NBC Dateline, MTV, Animal Planet, National Geographic, Discovery Channel, The Hallmark Channel, Modern Cat Magazine, Parade, Reader’s Digest, Cat Fancy Magazine, The New York Post, The Boston Globe, USA Today, This Wild Life, The Divine Cat, Real Simple Magazine,, Petside, Freekibblekat, The Toronto Star, Canada Globe and Mail, Animal Rescue Site, The Daily Cat, Feline Wellness Magazine, Advisory Council, This Wild Life, The Cat Channel, Pets Magazine, The Circle, New Republic, The Sunrise Show,, Herald Sun, Toronto Star, and countless others. See our Media Room below for the latest.

Feline behavior therapy is very different from canine behavior therapy and the approach to changing a cat’s behavior is even more unique. Cats do not display obedience problems like dogs. The help you need is not focused on physical or verbal behavior modification strategies, like dog training with a dog trainer present. All cat behaviorists conduct consultations by phone or video via Skype. Our behavior plans are specific to cats and still allow for the natural feline instincts, but when and where you want them displayed. We will cover the behavior plan during the phone or video consultation and offer follow-up over the course of several weeks for all of our consultation programs.

Call The Clinic Today at 503-267-8888