Toxicity to pets

Cholecalciferol, also known as Vitamin D3, is an active ingredient in some of the most potent mouse and rat poisons available today. When animals ingest an overdose of cholecalciferol, they develop gastrointestinal distress (e.g., vomiting, anorexia, and diarrhea), electrolyte disturbances (e.g. elevation in calcium and phosphorous), and kidney injury. Without prompt treatment the overdosed animal dies secondary to kidney failure.