Ever wonder why your dog suddenly lunges at the doorbell, ignores cues, or seems anxious for no reason? It’s easy to think it’s just bad behaviour, but dogs are far more complex than that.
The L.E.G.S. model, developed by canine behaviour expert Kim Brophey, helps guardians understand the four key factors shaping a dog’s behavior: Learning, Environment, Genetics, and Self. By looking beyond the behaviour itself, we can respond with understanding and build stronger, more trusting relationships with our dogs.
Each category of L.E.G.S. represents a different influence on behaviour. When we consider all four, we can respond with compassion and make changes that truly help our dogs succeed.
Learning
Every dog carries a lifetime of lessons. From early puppyhood to daily experiences, dogs are constantly learning what works and what doesn’t. A puppy who discovers that barking makes strangers step back may keep using that strategy as an adult.
Positive training, socialization, and careful management build a helpful learning history, while frightening experiences can create fear or reactivity. Recognizing what your dog has learned—good or bad—helps you plan more effective training.
Environment
Where and how a dog lives shapes their daily reality. Busy city streets, quiet rural settings, small apartments, or large backyards all influence a dog’s comfort and stress levels.
Household routines, the presence of children or other pets, and even changes, such as a move or a new baby, can trigger behaviour shifts. Sometimes, addressing behaviour is as simple as adjusting the environment. Adding enrichment, creating quiet spaces, or providing more mental and physical outlets can help reduce stress and encourage more positive responses.
Genetics
A dog’s breed or mix brings built-in instincts and tendencies. Herding breeds may chase moving objects, scent hounds may follow their noses, and livestock guardians may be wary of strangers.
These traits are not bad habits, they are the result of generations of purposeful breeding. Training can guide these instincts, but it can’t erase them.
Understanding genetic drives allows guardians to channel natural behaviors in healthy ways, such as providing scent games for a beagle or structured herding activities for a border collie.
Self
Finally, every dog is an individual. Age, personality, health, and emotional state all play a role. Pain, illness, hormonal changes, or even a shy temperament can affect how a dog reacts to the world. A sudden behaviour change often signals a medical issue, making veterinary checks an important part of any behaviour plan.
Final thoughts
Our dogs are complex, living beings shaped by many influences. By looking at their behaviour through the lens of L.E.G.S., we can move beyond frustration and blame, and instead focus on understanding, patience, and building a stronger, more trusting bond with our canine companions.
The beauty of the L.E.G.S. model is that rather than just trying to stop a certain type of behaviour, it encourages us to ask: what’s driving this behaviour?
Considering learning history, environment, genetics, and the dog’s unique self, helps guardians set realistic expectations and create strategies that support both dog and human.
With this holistic perspective, we can respond with compassion, guide behaviour effectively, and strengthen the relationship we share with our dogs.
