Status-related aggression, resource guarding, and fear-related aggression in 2 female mixed breed dogs

Two household dogs, a 2 year, 8-month-old, spayed female, mixed-breed dog, and a 4 year, 1-month-old, spayed female, mixed-breed dog, presented with a history of aggression toward each other, when in possession of food or other high-value items, and when one approached the other while resting. They responded satisfactorily to treatment with serotonergic drugs, avoidance of provocative situations, and environmental and behavioral modification.