A big warty, brown, ugly cane toad just sitting in the dirt. It weighs 2.7kg - 6lb and is 25cm - 10" long It looked like a plastic toy toad. A football with legs. A cane toad that size will eat anything it can fit into its mouth, and that includes insects, reptiles, and small mammals.
Sounds like something you folks need to help curb the mice problem. Do it in combination with other rodent eat animals though. Like a three prong front against the mice.
