+ Poisonous Plants Ms. Gottfried. + Most likely you have them in your pasture… HUNDREDS of plants that are common in North America are poisonous to horses.

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Presentation transcript:

+ Poisonous Plants Ms. Gottfried

+ Most likely you have them in your pasture… HUNDREDS of plants that are common in North America are poisonous to horses. Very few green pastures have no poisonous plants in them. Luckily, there are a few good reasons why horses don’t eat most of them!

+ Why do most horses not eat them? Thankfully, most are not palatable. What horse wants to eat a small bitter plant when there is so much sweet green grass around? Horses are HUGE Because of a horses large size, it takes a lot more than one bite to reach toxic levels.

+ On the other side… Some plants can be toxic even with a nibble. It is important to recognize these plants visually. To help prevent them in your own pasture To recognize them when visiting other places

+ Bracken Fern (aka: brake fern, eagle fern) A perennial fern that has triangular leaves that can reach 2-3 feet high. Grows in clumps in woodlands and moist, open areas. Grows all over North American except the desert climates.

+ Bracken Fern Contains thiaminase, which inhibits absorbtion of thiamin (vitamin B1) Necessary for nerve function Causes neurological impairment. Some horses actually develop a taste for Bracken Fern!

+ Bracken Fern Symptoms: Neurological dysfunctions due to Vitamin B deficiency. Depression, in coordination and blindness Treatment: Large doses of thiamin over a few weeks if caught early.

+ Now you! Hemlock aka: poison hemlock, spotted hemlock Tansy Ragwort Johnson Grass/Sudan Grass Locoweed  Yellow star thistle/Russian knapweed  Yew  Red Maple Trees  Water Hemlock  Oleander  Yellow star thistle/Russian knapweed  Yew  Red Maple Trees  Water Hemlock  Oleander