Schedule with Licensed Veterinarian and Cat Behaviorist Team

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33 Years in Practice the Feline Cognition Rescue™ Program Developed by the Clinic Helps Cats with Complex, Chronic, or Severe Behavior Issues.

Founders of the Cat Behaviorist Specialty Helping Cats in Over 30 Countries

Zoom Appointment Update: We are scheduling our doctor and cat behaviorist team through July 31st.  Through July 22nd 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).

View 350 Client Testimonials

Cat Behaviorist Mieshelle Nagelschneider In My Cat From Hell 2 Standing behind a large Magnifying glass | Mieshelle Nagelschneider | Cat Behaviorist |
Mieshelle Nagelschneider and Vet | The Cat Behavior Clinic | Mieshelle Nagelschneider | Cat Behaviorist
Mieshelle's Cat Science Book is Curriculum to Certify Many Cat Experts You See Today and Even Part of Entrance Exams to Colleges and Universities. The Cat Behavior Clinic is the Recipient of the “Gold Purr Award” and the “2020 Business Award for Exemplary Businesses and People in the Field of Animal Behavior”. She is also the new host for the 2-time Academy award winning television show “My Cat From Hell” for Discovery Plus Channel with over 1 billion viewers internationally. (Photo: Mieshelle with her partner who is also a veterinarian).

Our team of cat behaviorists and licensed veterinarians ensure that your cat receives expert and comprehensive holistic care beyond conventional cat behavior advice. With specialized knowledge, clinical expertise, and ongoing scientific research, our clinic brings both medical insight and behavioral understanding allowing us to tailor our services to address the specific behavioral needs of your cat.

How to Schedule for Cat Owners

  • In-home, phone, or Zoom cat behavior appointments: to learn more about the process or to schedule, please call the clinic at 503-267-8888. You can also schedule through this clinic website online here. We guarantee an appointment within 1 to 7 days.
  • Cat behavior exclusively, we specialize in urination, defecation, all forms of aggression, and excessive vocalization. Read about our outstanding clinic success rate for common cat behavior issues.
  • Urination or defecation consultations receive the $125.00 study discount by participating in our feline study for the 4 week program.  You will be helping cats just like yours that are experiencing litter box issues.  You can call the clinic to schedule or visit online here.
  • Dietary Questions?: Mieshelle is also the cat nutritional scientific research and development expert for one of the largest cat food company and manufacturer in the world. Our clinic believes diet is the cornerstone for a behaviorally thriving cat.
Three Women and a Man working on Four Cats | Mieshelle Nagelschneider | Cat Behaviorist

Cat Behavior Areas of Specialization: Cat Urination, Defecation,
Spraying, Aggression and Vocalization Behavioral Issues

33 Years in Practice, Licensed and Certified, Harvard and Oxford-trained, Award-winning Cats-exclusively Behavior Help Scientifically Observing and Analyzing Your Cat’s Gene-encoded Behavior From a Behavioral Cognitive, Ethological, and Feline Evolutionary Point of View.

The Cat Behavior Clinic is the first Cats Exclusively behavior clinic in Portland, Oregon.  Our skilled doctors and certified cat behaviorist have more cat owners purring than anyone.  Conducting several thousand urination, defecation, and cat aggression cat behavior consultations, our cat behaviorist is also a cat behavior expert and researcher for National Geographic and the host for the television show “My Cat From Hell” on Discovery Channel.  Please visit our home page to view common cat behavior issues we work with and  to schedule an appointment. The clinic routinely works with cat owners who feel they have tried everything to solve their cat’s behavior issues.  Learn more about our team here.

Image of a Ginger Kitten being Playful | The Cat Behavior Clinic | Cat Behaviorist | Mieshelle Nagelschneider
Closeup Portrait of Calico Maine Coon Cat lying on Table with Pink Flower beside |The Cat Behavior Clinic | Mieshelle Nagelschneider | Cat Behaviorist

Applying the sciences of gene-encoded wild felid behavior, animal psychology, feline learning and memory and biology to effectively correct a cat’s behavior long term.

33 Years in Practice, Licensed and Certified, Harvard and Oxford-trained, Award-winning Cats-exclusively Behavior Help Scientifically Observing and Analyzing Your Cat’s Gene-encoded Behavior From a Behavioral Cognitive, Ethological, and Feline Evolutionary Point of View.

An in-depth scientific analysis of cat behavior based on the evolutionary biology of the cat, has enabled the clinic to help thousands of cat owners for over two decades not only in Portland, but remotely in over 30 different countries.  Because of a lack of board certified veterinary behaviorists specializing in cats and credentialed cat behaviorists has always been an ongoing issue (and still is) not only in Portland, Oregon, but around the world, the clinic has helped cat owners from New Zealand to Kuwait by video.  In addition to our cat behaviorist conducting local in-home, phone or video consultations, our veterinarians perform local in-home or vet-to-vet remote consultations.

Founder of the clinic, Mieshelle Nagelschneider, studied animal behavior at Oxford University, Harvard University, and the University of Edinburgh Royal School of Veterinary Studies.  She is also the new host for the 2-time Academy award winning television show “My Cat From Hell” for Discovery Plus Channel with over 1 billion viewers internationally.

Cropped Image of Mieshelle Nagelschneider watching recordings on three screens | Cat Behaviorist

What’s New with Mieshelle on National Geographic and Discovery Plus?

National Geographic Logo | Mieshelle Nagelschneider | Cat Behaviorist

Mieshelle is the new host of My Cat From Hell. It has over 100 billion viewers around the world since she has become the host and has also won 2 Academy Awards. Mieshelle also was the cat behaviorist for National Geographic’s Wild Side of Cats, and Animal’s Doing Things with Howie Mandel. She has also been the researcher and editor for National Geographic books and publications as the expert on the 37 species of wild cats (including the domestic cat).

Founder of the Clinic and Our Cat Behaviorist is a New York Times Acclaimed Cat Behavior Science Author – Random House Publishing

All Three Cat Behavior Books The Cat Whisperer Mieshelle Nagelschneider | Cat Behaviorist

Cat Behavior Testimonials for Portland, Oregon

View 350 solved case studies and cat behavior testimonials around the world.

Cat Behaviorist Portland Testimonial:  “I was extremely pleased with my experience with The Cat Behavior Clinic. I have been dealing with litter box issues for a very long time and my experience was a world away from working with an animal behaviorist vs. a cat behaviorist.  The cat problems I’d been dealing with were extreme and long term and after the consultation and following the instructions, my cats began using the litter box 100% of the time (before my consult it was 75% of the time) within 4 days.   I would strongly recommend working with someone who specializes in cats because if they don’t, they really have no idea what to do with cat behavior and I learned this the hard way after spending $1500.00 just to get in the door at another behavior clinic that got me not one ounce of success.  I will be letting my referral vet know what a great experience it was working with you guys.  All the Best,  J. M. and 6 Perfect and Happy Felines. Finally!”  Portland, Oregon

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,, 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