04/06/2026
One of the most damaging myths in modern dog training and animal behaviour is the idea that every animal can be fully rehabilitated with enough love, enough training, enough consistency, or enough positive reinforcement. They cannot. And the same is true in humans.
Some individuals recover remarkably from trauma, instability, neglect, pain, or chronic stress. Others do not, despite excellent intervention, safe environments, medication, therapy, behaviour modification, and years of support. This is because behaviour is not created by one single thing.
Behaviour is the result of genetics, early development, nervous system sensitivity, prenatal stress, pain, learning history, environment, social experiences, health, neurochemistry, resilience, and ongoing stress load all interacting together. There is no scientifically credible model of behaviour that says environment alone determines outcome.
Research in both humans and animals consistently shows strong heritability for anxiety, fearfulness, impulsivity, emotional reactivity, aggression, stress sensitivity, and resilience. Studies in behavioural genetics repeatedly demonstrate inherited differences in stress responsiveness and emotional regulation. Selective breeding absolutely influences behaviour.
Chronic stress and trauma alter the brain. Animals exposed to chronic fear, instability, harsh punishment, pain, chaotic environments, or repeated stress during sensitive developmental periods may never process the world normally afterwards.
Some individuals experience severe adversity and recover relatively well. Others experience comparatively mild adversity and struggle profoundly. This is true in dogs, humans, horses, primates, laboratory animals, and virtually every species studied.
Resilience is influenced by:
- genetics
- maternal stress
- prenatal environment
- early socialisation
- neurodevelopment
- attachment security
- pain
- chronic stress exposure
- learning history
- health
Two dogs can live through the exact same experience and emerge completely differently. A deeply traumatised, genetically vulnerable, pain-affected nervous system may improve dramatically and still never become “normal”.
