If pest control chemicals are not used correctly, they can cause harm to pets. Follow the instructions on the label. Keep pets away from treated areas until they have dried completely. Wash your pet immediately with soap and water if they come in contact with chemical substances. Make sure you have the container with the chemical in it so that you can identify it and notify your veterinarian if your pet develops symptoms. Certain pesticides are more dangerous than others. For example, synthetic pyrethroids are used in household insect sprays. They can be toxic to pets if they are ingested. Keep pets away from products that contain pyrethroids. Another type of pesticide that can cause severe allergic reactions in animals is the organophosphates. Organophosphates are used frequently in agriculture, and they can also be found in household products. Ingestion of organophosphates in pets can cause neurological damage or even death. Organophosphates can cause neurological damage and even death in pets if they are ingested.