Florida Certified Cat Behaviorist and
Licensed Veterinary Team

Phi Zeta

Oxford and Harvard-trained

33 Years in Practice We Specialize in the Scientific Research and Science-based Management of Cat Behavior Issues

Award-winning Harvard and Oxford-trained Cat Behaviorist and Host of the Most Watched Cat Behavior Science Show in the World with Over 1 Billion Viewers, My Cat from Hell

Mieshelle Nagelschneider standing photo behind My Cat from Hell 2 magnifying glass | | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com
Mieshelle Nagelschneider and Vet | The Cat Behavior Clinic | Mieshelle Nagelschneider | Cat Behaviorist
View 350 Cat Behavior Testimonials.  Our certified, licensed, and experienced cat behaviorist and veterinarian team provide comprehensive behavior care for Florida cat owners and vet-to-vet care for vets who need help with their clients
Mieshelle and adult and child seated at table holding cats | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com
Specializing in Cat Urination, Defecation, Marking, Aggression, and Vocalization Behavioral Issues.  We Apply the Sciences of Gene-encoded Behavior, Animal Psychology, Biology, Physiology, and Feline Learning and Memory to Effectively Correct Your Cat’s Behavior Long-term. 

Cats-exclusively and Over 33 Years of Scientifically Observing and Analyzing Your Cat’s Gene-encoded Behavior From a Behavioral Cognitive, Ethological, and Feline Evolutionary Point of View.

Florida Cat Behaviorist Team Distinctions: Recipient of the “Gold Purr Award” and the “2020 Business Award for Exemplary Businesses and People in the Field of Animal Behavior”.

Florida Cat Behaviorist Mieshelle Studied Animal Behavior at Oxford University, Harvard University, and The Royal School of Veterinary Studies (University of Edinburgh).  Read more about her animal behavior study at Harvard University that has enabled her to help Florida cat owners think more scientifically about their cat’s behavior (read more here).  Mieshelle is the appointed cat nutrition research and development expert for the largest cat food company and manufacturer in the world. You can watch Mieshelle on her new show, My Cat From Hell, for Discovery Plus Channel in China and other countries.  With over 1 billion viewers internationally, she has the most watched behavior show in the world.

Keep Your Cat at Home Appointments:
Schedule a Zoom, Phone, or In-person Appointment

Zoom Appointment Update: schedule with our doctor and cat behaviorist team through July 31st.  Through June 30th receive the study participation reduced fee for urination or defecation appointments. Become a part of Mieshelle’s 2-time Academy Award-winning cat behavior show production on Discovery Plus Channel (the most watched cat behavior show in the world with over 1 billion viewers).

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

Mieshelle on the Today Show TV show segment called Training 101 for your kitty | Mieshelle Nagelschneider | Cat Behaviorist | thecatbehaviorclinic.com
A Founder of the "Cat Behaviorist" Specialty, Mieshelle’s new 2-time Academy award-winning cat behavior show on Discovery Channel Plus is the most watched cat behavior show in the world with over 1 billion viewers internationally.
All Three Cat Behavior Books The Cat Whisperer Mieshelle Nagelschneider | Cat Behaviorist
Mieshelle’s scholarly-cited cat behavior science book is used as text book curriculum to certify "cat counselors" you see online today.  She has also been the editor and writer cat expert for National Geographic on the 37 species of wildcats (including the domestic cat) and a hybrid cat expert for Florida Savannah and Bengal cat owners.

Award-winning International Cat Behavior Science Author
Acclaimed by the New York Times and Published in 4 Languages

Mieshelle is the cat behavior science author of award-winning New York Times acclaimed scholarly-cited cat behavior book published in 4 languages (Random House Publishing).  Her book is currently the main text book curriculum used by certifying organizations to certify other cat behaviorists.  She is also the long time resident cat behaviorist and featured writer for Modern Cat Magazine.  You can find Mieshelle’s cat behavior articles, interviews and television appearances nationally and internationally here:  National Geographic, The Today Show, Hallmark Channel’s Home & Family Show, The New York Times, Nat Geo WILD, Animal Planet, NBC Dateline, MTV, Boston Globe, New York Post, Animal Rescue Site, Free Kibble Kat, Salon.com, Martha Stewart Radio, Whiskas, USA Today, Real Simple Magazine, Cat Fancy Magazine, Modern Cat Magazine, Feline Wellness Magazine, Advisory Council Pet360.com, This Wild Life, Divine Cat, Arm & Hammer, The Cat Channel, Pets Magazine, The Circle, Lifehacker, Catster, New Republic, The Sunrise Show,Yahoo.com, Herald Sun, Toronto Star, and Globe and Mail.

Hallmark Channel Home and Family Show with The Cat Whisperer 3 | Mieshelle Nagelschneider | Cat Behaviorist
Blue Double Quotations | Mieshelle Nagelschneider | Cat Behaviorist

Florida Cat Behaviorist Testimonials

“It took years to find help for my cat’s urination and marking issue.  He had been through every conceivable treatment (and some which had significant side effects) before working with The Cat Behavior Clinic.  After years of suffering we finally found appropriate help for our kitty and all with one phone call.  Thank you to The Cat Behavior Clinic.  You were our last resort.  You clearly know cats and are advocates for their behavioral happiness (and the owners too!)”.  (read 350 more testimonials here).

Nancy I.


Cat Urination, Vertical Spraying, Excessive Vocalization, and Aggression Issues are Solvable with a Holistic Behavioral Approach Including Behavioral Cognitive, Ethological and a Feline Evolutionary Biology Point of View.  

World-renowned Innovators of the Cat Behaviorist Specialty

Zoom or Phone Consultations with Oxford-trained Certified Cat Behaviorist Mieshelle Nagelschneider.  Mieshelle is the founder of the “Cat Behaviorist” specialty and the first cat-only behavior practice serving Florida cat owners (and the entire United States). To date, cats are very underserved when it comes to behavior help and there are still only a handful of cats exclusively behavior services in the United States. Our veterinarians conduct vet-to-vet consultations or in the state where they are licensed (they do not conduct home visits for cat owners in Florida).

The Cat Behavior Clinic goes beyond the obvious behavior strategies to change a cat’s behavior and offers complete and holistic behavior plans that apply training modalities that are based on your cat’s feline evolutionary biology.  Urination, defecation, urine spray-marking and aggression are the most common issues the clinic addresses.

Florida Cat Behaviorist Testimonials

Cat Behavior Testimonial:  Thanks to your cat behaviorist, we now have a urine-free cat family just like she said we would.  Our home no longer smells like cat urine and the added bonus is that our cats are so much happier.  The information provided is no where on the internet.  The consultation program was very worth our time and investment and we feel so lucky to have worked with Mieshelle.   Regards, The Taylor Cat Family, Miami, Florida

Florida Cat Behavior Review:  Well,  I can’t believe it took just 3 days, but it was that easy.  We DID NOT have to add extra litter boxes either.  Mieshelle is brilliant and saw the problems right away.  It’s week 7 and not one accident outside the box.  Claudine has begun playing again with her toys and she actually sits next to Augustus now.  This is unheard of and I can’t thank you enough.   All the best, One grateful and enlightened cat owner.  Paula S.  Orlando, Florida

Florida Cat Behavior Review:  I considered myself a very savvy cat owner having owned multiple cats my entire life, but I have learned so much from Mieshelle, your cat behaviorist.  When we rescued the feral cats from our Florida golf course, we had no idea what we were in for.  The urine almost ruined our home and the cats fighting almost ended our marriage.  Mieshelle became the light in the very small world of cat behavior knowledge available to cat owners.  We have recommended your practice to our Florida veterinarian and we will contact you after we return from our vacation to schedule our last call.  Thank you for all that you do.  Mary S. – Tampa, Florida

Image of Two Playful Ginger Kittens | the Cat Behavior Clinic | Cat Behaviorist | Mieshelle Nagelschneider
Image of a Ginger Kitten being Playful | The Cat Behavior Clinic | Cat Behaviorist | Mieshelle Nagelschneider

Florida Cat Behavior Consulting:  Schedule Your Cat’s Feline Behavior Wellness Program

Mieshelle performs in-person and remote consultations for the entire State of Florida (Miami, Tampa, Orlando, to Jacksonville and surrounding areas).  Mieshelle also conducts remote consults in over 30 countries.  Our veterinarians provide vet-to-vet remote consultations, in-person in the states they are licensed, and cross-review behavior cases at the clinic.  Please visit our clinic home page to learn more.

Educating Veterinarians How To Help Their Clients

Mieshelle lectures at the international level at education conventions for veterinarians, the Humane Society, and SPCA from Australia to the Philippines on common feline behavior issues.  She recently lectured to a team of 24 biologists in Costa Rica on the natural behaviors of the 6 wildcats that inhabit the region – Ocelot, Margay, Jaguar, Jaguarundi, Puma and Oncilla (Tigrillo).

What’s New with Wildcat Hybrid Expert Mieshelle and National Geographic

National Geographic Logo | Mieshelle Nagelschneider | Cat Behaviorist

Noted wildcat hybrid expert, Mieshelle is a long time cat behavior expert for National Geographic on the 37 species of wildcats (this includes the domestic cat) and their numerous cat documentaries, TV Shows, and published works.  You can watch her most recent Nat GeoWILD Show, Animals Doing Things with Howie Mandel.

Read 350 Solved Case Study Reviews and Client Testimonials for our Cat Behaviorist Helping hundreds of Florida Cat Owners Since 1999.


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

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, Salon.com, Petside, Freekibblekat, The Toronto Star, Canada Globe and Mail, Animal Rescue Site, The Daily Cat, Feline Wellness Magazine, Advisory Council Pet360.com, This Wild Life, The Cat Channel, Pets Magazine, The Circle, New Republic, The Sunrise Show, Yahoo.com, 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