How to stop puppy from being aggressive

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How to stop puppy from being aggressive

Updated Dec 8, 2024

Dear Cathy,

My eight-month-old puppy has started to show aggression. He growls and tries to bite when you try to pick him up or put on a leash. Treats are not working. Suggestions?

— Eileen, Commack, New York

Dear Eileen,

If this is a new behavior, take him to a veterinarian to rule out a health problem. If he is not fixed, get him fixed right away. After doing these things, follow the steps below:

Steps for stopping puppy from being so aggressive:

  1. He needs to learn who is in charge, and that only comes from consistent training. Right now, your stubborn little guy has learned he can control the household with a few well-placed growls and snaps. But you can begin to reshape his responses by training him to “sit,” “stay,” and “come” when called. The more you train him to listen to your simple commands, the less likely he will behave this way.

  2. For example, instead of picking him up, walk over to him, then turn away, slap the side of your leg to get his attention, and say “come” to get him to follow you. Puppies love to follow people, especially if their voices sound happy. When he moves from his spot, you should be able to pick him up with no issues.

  3. Once he learns to come when called, call him to you at least ten times a day, always giving him a treat to reinforce the behavior. This repetitive behavior teaches him you are more important than his spot.

If these things don’t help or he gets worse, please find a dog trainer or an animal behaviorist to evaluate his behavior.

Cathy M. Rosenthal is a longtime animal advocate, author, columnist and pet expert who has more than 25 years in the animal welfare field. Send your pet questions, stories and tips to moc.tidnuptepobfsctd-40ed0f@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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