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.~ <br />l <br />Effect and symptoms <br />Poisoning is associated with selenium poisoning. Effects of loco are slow. <br />Animals may acquire the habit of eating loco plants. Symptoms are loss of <br />flesh irregularity of gait, extreme nervousness, weakness, erratic actions, <br />and incoordination. Calf and lamb losses from abortion may be high. Horses <br />affected never recover completely. Signs appear 2 to 3 weeks of continuous <br />grazing of the plant. Animals develop a dull, dry coat of hair acid may <br />become violent when stressed. <br />Seaso~i luiimals <br />Common Scientific Name Dangerous Affected <br />Name <br />silky sophora Sophora nuttalliaua cattle, <br />sheep <br />Effect and symptoms <br />='~- ~. <br />-8- Loamy Plains l16 <br />The seeds contain a poisonous alkaloid and have been suspected of causing <br />livestock poisoning. Feeding experiments with both sheep and cattle <br />indicate that animals will not eat silky sophora. Force feeding of <br />comparatively large quantities of the green plant failed to result in deaths <br />or even in illness. p <br />Season luiimals <br />Common Scientific Name Dangerous Affected <br />Name <br />variable senecio <br />Senecio mutabilis when palatable <br />forage is <br />scarce. <br />Mostly cattle <br />and horses, <br />sheep are <br />ususally not <br />affected if <br />fed on sup- <br />plement during <br />the dry range <br />conditions in <br />the spring. <br />Effect and symptoms <br />Symptoms are progressive and effects are cumulative. Weakness, diarrhea aid <br />darkly stained urine may be observed. Animals die quickly or wander <br />aimlessly. Adequate' feed or supplement during the spring will reduce the <br />hazard. <br />J <br />