When routine behavior changes look for a health problem

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When routine behavior changes look for a health problem

Updated Dec 8, 2024

Dear Cathy,

Our wonderful sweet rescue dog, Pippin, has developed some sort of anxiety at bedtime. This behavior has come out of the blue. He is about eight and we have had him almost five years. Until recently, he seemed to really love bedtime. He would jump into our bed and cuddle. When we turned the lights off, he would move to the end of the bed to sleep for the night.

He still jumps onto the bed during the day, but suddenly, he stopped jumping onto the bed at night and wants to sleep in the bathroom. When we pet him to comfort him, we can feel him trembling. During the day, his behavior is normal. The only other time we have seen this anxious behavior is in the car, but we chalked that up to some trauma in his life before we adopted him. We feel so bad for him. We hope you can give us some advice. He weighs about 18 pounds and is a Schnauzer/ Yorkie mix.

– Harriette Westbury, New York

Dear Harriett,

When a pet suddenly changes a routine behavior, it’s time to take him to the vet for a health exam. Health issues can impact and change a pet’s behavior overnight, especially with older pets. In fact, sometimes the only way you know something is wrong with your dog or cat is that they suddenly stopped doing a behavior they always do.

Pain, thyroid and gastric problems, cancer, ear infections, toothaches, can all cause a sudden change in behavior. Often, dogs feel worse at night because they are less distracted. So, take Pippin to the vet and let me know what the doctor says. I am almost certain there is something going on health-wise.

Cathy M. Rosenthal is a longtime animal advocate, children’s author, syndicated pet columnist, and pet expert with more than 30 years in the animal welfare field. Send your pet questions, stories and tips to moc.tidnuptepobfsctd-3bc716@yhtac. Please include your name, city, and state. You can follow her @cathymrosenthal

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Cathy Rosenthal (aka The Pet Pundit), CHES, CFE

Animal Welfare Communications Strategist, Writer & Educator

Cathy M. Rosenthal is an award-winning humane educator and author, animal welfare strategist, pet columnist, and speaker who has spent more than 38 years working in animal welfare with local and national humane organizations. She helps people better understand and care for animals through her nationally syndicated My Pet World column and has been the longtime pet columnist for the San Antonio Express-News since 2003.

In addition to her writing, Cathy develops humane education, leadership, customer service, and compassion fatigue training programs for animal welfare organizations nationwide, and has helped raise millions of dollars through grant writing, strategic communications, and program development.

Cathy is the editor and curator of Humane Perspectives: Leadership in Animal Welfare and is the author of several books, including Grant Writing Boot Camp for Animal AdvocatesThe Lucky Tale of Two Dogs, and The Happy Tale of Two Cats, which was the 2026 winner of the Association of Professional Humane Educators’ (APHE) "Educator’s Choice Award" for Best Humane Education Book for Young Children. She also received the 2026 APHE Nathania Gartman Heroes Award for Impact in Humane Education. Her humane education programs in Texas have reached more than 45,000 elementary school children since 2019.

She resides in Texas with her husband, their cat Sterling, and a former community cat, Maddie, who successfully negotiated an indoor living arrangement but still considers human affection highly negotiable.

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