Either a 336 gm or  1.8kg pail of rat bait.  Contrac All-Weather Blox is an anticoagulant rodent bait for the control of rats and mice. Single-feed bait requires just one feed for it to kill rats and mice.  This toxicant is less toxic to non-target animals in primary and secondary poisoning situations than other single-feeding anticoagulants.  Mould and moisture resistant.