![]() ![]() Treatment includes sodium nitrite and sodium thiosulfate many cases die too quickly to receive treatment. Fruit from Prunus species is not poisonous but seeds and pits are. Blood and mucous membranes of affected animals are bright red. Livestock ingest Prunus plant material when other forage is unavailable and out of curiosity when a branch falls into a pasture. ![]() ![]() Signs of poisoning appear rapidly and are those of cyanide toxicity: difficulty breathing, excitement, tremors, gasping, dilated pupils, bright pink mucous membranes, bloat, staggering, involuntary urination and defecation, convulsions, coma and death due to asphyxiation. The toxic agent is a cyanogenic glycoside which makes hemoglobin unable to release oxygen at the tissue level. Wild cherry, chokecherry, black cherry, peach, apricot and cherry laurel ( Prunus species) have poisonous leaves, twigs and bark. To learn about other potential sources of plant toxicity, producers are encouraged to consult the references cited at the end of this article. The plants discussed here were selected because of their ability to cause serious illness, abundance in the PNW or other special factors. This article is in no way meant to be an exhaustive list of all the PNW’s poisonous plants. It behooves all livestock producers to become familiar with the toxic plants growing in areas where he/she pastures or houses animals. Signs of toxicity can range from as mild as brief indigestion to as severe as sudden death. Unfortunately, some of these plants are toxic to livestock. The PNW abounds with a huge variety of native and imported plants. ![]()
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