Study Reveals Shocking Truth About Dog Behavior—Aggression, Anxiety, And More Are Common

A recent study conducted by a researcher at the Texas A&M College of Veterinary Medicine and Biomedical Sciences has revealed that over 99% of dogs in the U.S. exhibit behaviors that could be considered problematic. The study, published in the Journal of Veterinary Behavior, found that the most common behavioral issues include aggression (55.6%), separation and attachment behaviors (85.9%), and fear and anxiety behaviors (49.9%). The research utilized data from the Dog Aging Project, which collects information from dog owners to better understand canine aging and health, as reported by the Texas A&M College.

Dr. Bonnie Beaver, a professor at Texas A&M and author of the study, explained that the research centered on 28 behavior-related questions, asking dog owners to rate their pets on a scale from zero to four, with four representing serious issues. Although the study found that over 99% of dogs showed at least one moderate to severe behavioral trait, Beaver emphasized that most problems are minor and often go unnoticed. She also noted that behaviors like anxiety and aggression frequently overlap, making it difficult to pinpoint exact causes.

Beaver stressed the importance of addressing behavior concerns early to prevent escalation. She pointed out that many dog owners don’t bring up such issues during veterinary visits, and some veterinarians may not ask about them. To encourage more open conversations, she recommended providing behavior questionnaires ahead of appointments. Beaver also warned that while many behavioral problems are mild, some—particularly aggression—can pose safety risks. She advised owners to learn how to read canine body language and be especially cautious around children, who are the most common victims of dog bites.