A dormant pressurized or non-pressurized pouch, canister or bag containing a debilitating substance, such as a pepper mace, that deploys when bitten, clawed or otherwise punctured or squeezed. Attached or imbedded on a pet' s collar, on a hiker' s clothing or on a rancher' s animal, the victim does not need to activate any defensive measure when attacked; the attack itself releases the chemicals. The chemical defense system not only curtails any immediate attack due to instant disbursement of debilitating chemical agents, but also allows some protection over time as the victim is temporarily coated with noxious chemicals, and able to escape the attack.