61101 Halt Dog Repellent 1.5 oz (ORMD Hazardous) .35% Capsaicin PepperHalt! products use Capsaicin, a naturally occurring extract of pepperswhich , when sprayed in a dog's face, causes only temporary, butextreme discomfort for the dog. The manufacturer, ARI, reports that USPostal Service has been using Halt! since 1966. Halt! stops animal inits tracks, giving you time to move out of danger. Halts! pressurizedspray is accurate up to 10 feet.