Cat Behaviorist Portland Clinic
33 Years in Practice OXFORD-TRAINED
Certified Cat Behaviorist and Licensed Veterinary Referral Service Specializing in Complex, Chronic, and Severe Cat Behavior Issues
350 5-star Client Testimonials
Did You Know? Dr. Shultz and Mieshelle Authored the Required Cat Behavior Science Textbook Curriculum to Become Certified in Cat Behavior
Founders of the Cat Behaviorist Specialty Helping Cats in Oregon
2026 Zoom Appointment Update: Schedule with our clinic cat behaviorist through September 30th. Through September 7th 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).
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”. Mieshelle 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.
Science and Evidence-based: Our Harvard and Oxford-trained clinic cat behaviorist ensures that your cat receives expert and comprehensive behavior care beyond conventional cat behavior advice. With specialized knowledge, clinic research, and 33 years of clinical expertise, our services 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. Cases are reviewed by our behavior team and, if needed, referred to independent doctors within our professional referral network.
- Cat behavior exclusively, we specialize in urination, defecation, urine marking, all forms of aggression, fear-based behaviors, overgrooming, pica, food issues, and excessive vocalization. Read about our outstanding clinic success rate for common cat behavior issues.
- Urination or defecation consultations receive the $100.00 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.
Cat Behavior Areas of Specialization: Cat Urination, Defecation,
Spraying, Aggression, Anxiety, Pica, Overgrooming, Food “Obsession” and Vocalization Behavioral Issues
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 one of the first Cats Exclusively behavior clinics in the U.S. Our skilled cat behavior clinic cat behaviorist has conducted several thousand urination, defecation, spraying, aggression, pica, and overgrooming cat behavior consultations. Our cat behaviorist Mieshelle Nagelschneider is also a cat behavior expert and researcher for National Geographic and the host for the television show “My Cat From Hell” on Discovery Plus 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. Our independent veterinary network is also available for referral if needed. Learn more about our referral doctor team here.
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, 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 three decades not just in Oregon, but remotely in over 30 different countries.
What’s New with Mieshelle on National Geographic and Discovery Plus?
Mieshelle is the new host of My Cat From Hell. The television show on Discovery Plus has over 1 billion viewers around the world since she has become the host and has also won 2 Academy Awards as the most popular reality show. 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 wildcats (including the domestic cat). She has also conducted cat behavior research studies for large companies related to cat products including the Litter Robot and popular cat pheromone product. She is also the award-winning international scientific research consultant for one of the 5 largest cat food companies and manufacturers in the world.
Published in 5 Languages: New York Times Acclaimed Cat Behavior Science Author – Random House Publishing
Cat Behavior Testimonials
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 and Author Mieshelle Nagelschneider, The Cat Whisperer™️ and New Host of My Cat from Hell on Discovery Plus
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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
