German and Spanish mice have rapidly evolved the trait by breeding with an Algerian species from which they have been separate for over a million years.
The researchers say this type of gene transfer is highly unusual and normally found in plants and bacteria.
The Current Biology report says this process could yield mice resistant to almost any form of pest control.
Warfarin is a drug widely used in medicine as an anti-coagulant to prevent the build-up of harmful blood clots. It works through inhibiting a protein called VKORC1. This protein turns on our ability to produce vitamin K, which is essential for clotting.