Kaput Mouse Blocks present a reduced-risk rodenticide that kills Norway rats, Roof rats, house mice, deer mice, white-footed mice, and voles. The bait is formulated with warfarin- a highly effective anticoagulant with very low environmental or secondary toxicity. Because warfarin is effective against rodents at extremely low concentrations, it is one of the safest active ingredients in rodenticides. However, in cases of accidental poisonings of children or pets, Vitamin K1 is a readily available antidote. Formulated with paraffin, the Kaput Mouse Blocks are moisture-resistant and durable. The blocks have ridged surfaces to facilitate rodent gnawing, and a hole through the center allows the blocks to be fastened down inside a bait station. Quality grains ensure that the rodents are easily attracted to the blocks, and continue to feed on the bait.