The drug that kills dogs at first sight may be potassium cyanide, also known as potassium cyanide. It is a commonly used rodenticide that is highly toxic and acts quickly. It will inhibit the central nervous system of dogs after ingestion. , first muscle spasm, later respiratory failure, cardiac arrest and death.
The medicine that kills dogs when they smell it may also be succinylcholine, which is a kind of nicotine Acetylcholine receptor blockers can relax muscles and are often used for general anesthesia. If the dosage is small, the poisoned dog will be paralyzed and unable to move. Once the dosage is too much, it will cause paralysis of the dog's respiratory muscles. Even suffocated to death. Therefore, it is not recommended that you buy these drugs to harm your dog.