Why would two well-behaved and personable dogs suddenly and violently attack each other? Cesar reveals how dogs communicate through their energy and body language, to help resolve a potentially disastrous situation. Two Jack Russell terriers, Ruby and Jinx, have lived together for years but have begun fighting aggressively every time they are anywhere near each other. Their owner, Sandy Hill, has rearranged her life to keep the two dogs separated at all times. Sandy believes that if she doesn't intervene when the dogs start to fight, it will become a battle to the death.