1. Poisoning in Veterinary Practice;C., Clarke E.G.; L, Clarke Myra,1975
2. The Concise British Flora in Colour;Forsyth, A. A., 1968;Bulletin; The Pocket Guide to Wild Flowers,1965
3. Poisonous Plants and Fungi in Colour;North, P.M.,1967
4. Separate the animals from the poisonous plants
5. If the animals are ruminants keep them walking gently so that they will not settle down to chew the cud. (The first signs of yew poisoning are sometimes delayed until the animals ruminate some time after they have eaten the plant.)