Certain breeds like terriers have strong prey drive making tail chasing rewarding.
Instinct & Genetics
Running in circles expends energy and provides dogs solo playtime.
Exercise & Play
Lack of activity and understimulation may lead dogs to chase tails.
Boredom
For some dogs, tail chasing becomes a self-soothing, compulsive behavior.
Stress Relief
Some dogs learn tail chasing gets a reaction from owners.
Attention-Seeking
Excessive tail chasing may indicate anxiety, OCD, or other psychological issues.
Anxiety or OCD
Discomfort from rear end skin or tail problems can trigger chasing.
Fleas or Pain