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Poisoning depends on palatability of the plant, stage of development, conditions under which it grows, moisture content, and the portion eaten – some have highest concentration of poison in roots or seeds. Before turning your animals into new pastures get rid of any toxic plant.

PLANTS TOXIC TO CATTLE:
Arrowgrass
Brackenferm
Broom snakeweed
Buckeye or hose chestnut
Chokecherry
Death camus
Greasewood
Halogeton
Hemlock
Horsetail
Jimsonweed
Johnsongrass – after drought or frost
Larkspur
Locoweed
Lupine, which is a wild flower
Milkweeds