Roban Rodenticide Blocks 240g medium 1kg pack suited to a

1kg pack suited to a typical home

Some similar small seed-eating birds may eat the grains

but it isn't selective towards insects

depending on the severity of the infection

Roban Rodenticide Blocks 240g medium 1kg pack suited to aRoban Rodenticide Blocks 240g: Pet Safer Difenacoum Bait for Rats & Mice If you've had rat or mouse problems that just won't clear with the usual supermarket baits, resistance is often the reason. Roban Rodenticide Blocks are built for exactly that situation. They use difenacoum, a second generation anticoagulant that knocks down both rats and mice, including populations that have grown resistant to older brodifacoum, bromadiolone and warfarin baits.