Diphacinone - see also Wafarin
Is an ingredient contained in rat and mouse poison, which in turn is poisonous to our cats. It is recommended to keep all of your cats away from any rat/ mouse poison or bait when it is laid down or stored. Cover the poison over to stop larger animals accessing it. Even if you are advised that the poison is not palatable to cats, beware, our cats have very strange tastes and will consume the most unpalatable of substances. Likewise keep your cat away from any dead or dying rodents as they also may be inadvertently poisoned.

Clinical Signs
Pale mucous membranes, cold extremities, coughing, possibly coughing up blood, increased respiratory rate or difficulty in breathing, bleeding gums, vomiting, or vomiting up blood, blood passed in the urine, diarrhoea, blood passed in the faces, abdominal