Florida Cat Behaviorist Mieshelle

Our Cat Behaviorists at The Cat Behavior Clinic

Our Oxford-trained Certified Cat Behaviorist and Veterinarian Have More Cat Owners Purring Than Anyone

Cat needing behavior help
Founder of the “Cat Behaviorist” Specialty, The Cat Behavior Clinic Provides Excellent and Comprehensive Behavior Care Based on Your Cat’s Feline Evolutionary Biology.

Helping Cat Owners in Over 30 Countries for Two Decades

Schedule a Phone, Video or In-person Cat Behavior Consultation. View 350 Solved Case Study Reviews and Testimonials from Phone and Video Consultation Programs

From Chicago to Switzerland Scientifically Observing, Analyzing, and Correcting Your Cat’s Behavior Long Term

The first “cat behaviorist” practice in the United States, the clinic offers in-home, phone or video cat behavior consultations. We have helped thousands of cat owners in over 30 countries for over two decades. Founder of the clinic, certified cat behaviorist and New York Times acclaimed feline behavior science author, Mieshelle studied animal behavior at Oxford University, and The University of Edinburgh – The Royal School of Veterinary Studies.  Her past study at Harvard University has also enabled her to help thousands of cat owners think more scientifically about their cat’s behavior. 

Professional Statement

Innovator of the “Cat Behaviorist specialty, the clinic has always felt that it’s important to offer support to cats and their owners, which has led to our behavior expert’s career as a behaviorist for cats.  It allows them to help cats and their owners every day.  In providing care, Mieshelle says her primary goal is to “partner with cat owners so that they feel empowered to manage their cat’s behavioral health effectively.”  Cats are still the most misunderstood companion animal putting them at the greatest risk.  Even with the increase in cat popularity making them the most common household pet, they are considerably underserved when it comes to behavior help.  Mieshelle’s partner, who is a veterinarian, says there is definitely a large void in general veterinary medicine when it comes to behavior care for both cats and dogs.

Florida Cat Behaviorist

Since 1999 the Clinic Has Solved Thousands of Cat Behavior Issues Going Beyond the Obvious Feline Behavior Strategies and Facts

The clinic has changed thousands of cat’s lives worldwide by not only improving their behavior, but also by elevating the status of the most misunderstood companion animal, the cat.  Mieshelle has been the guest behavior lecturer, key note speaker, and cat advocate Best Friends Animal Society, International Humane Society and SPCA behavior conventions educating hundreds of veterinarians, shelter workers, and cat owners on behavior issues in cats to improve their lives and those of their owners, too.  In addition to Mieshelle’s remote phone or video consultations, veterinarian Dr. Jim Shultz has been a private practice and mobile service veterinarian for small animals and conducts cat behavior consultations locally or consulting vet-to vet service remotely by video/phone.

“Literally our problem seems to be solved “overnight” and we are very optimistic that this will stay: we even see her using the cat litter box; she buries her urine, and seems to be very comfortable.  This is unbelievable, Mieshelle.  We are very thankful for your precious help and knowledge.” – Best regards, Andrea & David M. Chicago, Illinois

Cat Behavior Editor and Expert for National Geographic 37 Wildcat Species

She is also a feline behavior science writer/editor cat expert on the 37 species of tigers and wildcats including the domestic cat and wildcat hybrids for National Geographic documentaries and published works in addition to her own New York Times acclaimed feline science book published by Random House Publishing in 4 languages.

New York Times Acclaimed Feline Behavior Science Author, Cat Welfarist, Spokesperson and International Cat Advocate

Mieshelle Nagelschneider has conducted several thousand cat behavior consultations since 1999 around the world (in over 30 countries) and is referred by, worked with, and trained veterinarians, cat shelters, and even wild-cat sanctuaries from England to North America to the Philippines.  She has also performed much needed cat studies for Hammacher Schlemmer on advanced litter box technologies and perching and resting areas for cats as well as been a spokesperson and Cat Behavior Expert for National Geographic, Whiskas, Arm & Hammer and Comfort Zone nationally and international including media tours around the globe to improve the status of the companion animal at the greatest risk, the cat.


Award-winning, Random House Publishing, The Cat Whisperer. Acclaimed New York Times Feline Science Writer (with co-writer Cameron Powell).

“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 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

Cat Behaviorist Mieshelle has earned her reputation as a pillar in the cat behavior specialty.  In addition to solving behavior issues around the world, she has also improved the status of the cat in countries like the UAE, the Philippines, Costa Rica, Canada, and Australia.  In addition to being a New York Times acclaimed feline behavior science author (Random House) solving cat behavior issues for over two decades, Mieshelle founded The Cat Behavior Clinic in 1999 and has continued making creative and innovative advances in cat behavior including a several year study on the social well being of cats being housed together.  Learn more about our outstanding 95% Clinic Success Rate.  

Featured in the New York Times and Known as the Founder of the Cat Behavior Specialty (Inner Lives of Cats author Thomas McNamee)

And among the clients who follow her advice, including her proprietary C.A.T. Plan™, her success rate is 95% or better and close to 100% for the most common cat behavior issues. Read our clients’ success stories and see why the Clinic is a smart choice for stopping all behavior problems now and future ones from occurring (very important!). You can also read Mieshelle’s charming story of how she became a lover and observer of animals, nearly 40 years ago, in her Life Among the Animals (excerpt from her cat behavior book — Random House Publishing with co-writer Cameron Powell).  Her cat behavior science book is required curriculum coursework for a number of animal behavior certifying organizations.

Mieshelle can solve your cat’s behavior issues with a behavior plan designed for your cat(s) that include the latest scientific research and advanced techniques (found only here) that have helped thousands of cats and their owners.  Litter box elimination issues, urine marking, excessive meowing, inter-cat social and aggression issues, are her specialty. The veterinarian also conducts consultations locally for all behavior issues.

Cat Behaviorist Mieshelle is also known for solving cat behavior issues around the world that are deemed “unfixable”.  From Chicago, New York, Florida, Washington, Texas and all the way to Japan.

Mieshelle is a long time member of the Animal Behavior Society and the Association of Animal Behavior Professionals, and Cat Behavior Counselors.  She has studied cat behavior for decades, and she continually keeps abreast of and takes part in observational studies on cats which has enabled her to provide behavior plans and techniques that have given proven results.  See 350 solved case studies and client testimonials

About Cat Behaviorist
A Cat Patient with our Veterinarian Dr. Jim Shultz.

One very crucial component in treating some cat behavior issues is ongoing help after the initial consultation.  Because appropriate and sound behavior advice for a specific cat is not one-size-fits-all, continued correspondence with your behaviorist is possible at The Cat Behavior Clinic.

Mieshelle is a popular resource for many cat-only veterinary practices nationwide, many wild cat sanctuaries, and countless animal shelters needing expert advice on feline behavior, which she will often donate her time to.  Mieshelle has worked professionally with thousands of domestic house cats, wild, and feral cats. She is referred by many vets nationwide for her remote behavioral consulting.

Mieshelle visited the capital and recently testified along with The Paw Project team on the anti-declaw bill to end cat declawing.  She spoke at great length to urge lawmakers to ban declawing.  She is also an active supporter of the new anti-declaw film, The Paw Project, by veterinarian Jenny Conrad.

Featured in The New York Times and a best-seller on Amazon, Mieshelle’s breakthrough science-based book on her C.A.T. Plan system for solving and even preventing all feline behavior problems, The Cat Whisperer (Random House Publishing with co-author Cameron Powell), is available online or in bookstores now!

As an International Cat Behavior Expert for:  Whiskas, Arm & Hammer Cat Litter, and Comfort Zone, and cat welfarist for the SPCA in Australia to cats in the Philippines at The International Cat Association as The Cat Whisperer™, she has saved thousands of cats’ lives directly and indirectly through her lifetime of cat behavior work.  Along with Best Friend’s Animal Society and Stray Cat Alliance in L.A. as a welfarist for cats and as their guest speaker, The Cat Whisperer™, Mieshelle has educated cat owners on cat behavior issues.