If they eat enough, rodenticides can spell serious trouble for your dog. There are basically three types of rodenticides. Dr. Knight explains that anticoagulants interfere with the blood clotting process. Warfarin is an anticoagulant which has been on the market since the 1950s. Over the years, rodents have become resistant to warfarin.
Anticoagulants are the most common rodenticide on the market.
Vitamin D3 or cholecalciferol disrupts calcium metabolism. It causes calcium and phosphorus to leave the bone and accumulate in the animal's soft tissue organs, especially in the kidneys. Bromethalin interferes with the animal's central nervous system causing irreversible neurological damage. Dr. Knight stresses that all of these rodenticides generally cause a time delay to sickness or death in animals. Out of the 50,000 to 60,000 chemical compounds that exist, only a relative handful have antidotes to counter their action.