A rodenticide composition is described along with a method for using the sametoexterminate rodents. The composition features a mixture of a dehydrant, acomposition forproducing endogenous gas, a dietary emulsifier, a hypercalcemia promoter, anda source ofcellulose. After consumption of the composition by a rodent, the dehydrant andsource ofcellulose cause the rodent to experience dehydration, while the endogenous gasproduced by thecomposition causes bloating and increased digestive stress. The dietaryemulsifier andhypercalcemia promoter cause digestive stress, which reduces the rodent'sdesire to feed andquickens dehydration and death. Once the rodenticide composition is prepared,it may be placedin areas frequented by or infested with rodents so as to kill the rodents oncethey consume thecomposition. One or more flavorings, coloring agents, and weather resistantmaterials may alsobe added to the composition.