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Name: eddie
Location: N/A
Country: N/A
Date: N/A


Question:
Is Milkweed, fatal to mature beef cows? Hay was round baled in June and does contain milkweed. We switched them to Alfalfa today.



Replies:
Dear Eddie,

Looks like it could be.
See:
http://wwwtvmdl.tamu.edu/bulletin.htm
Region: Central Texas
Posted: December 23, 1998
Horsetail milkweed toxicity in a horse:
"A 7-year-old gelding was anorectic for 8 hrs prior to acute onset of ataxia. A stable mate had died 24 hrs previously. Evaluation of the stable environment revealed a plant other than alfalfa present in the hay left in the feed box. The hay trash was submitted for plant identification, along with reflux from the gelding. Both contained fragments of horsetail milkweed (Asclepias subverticillata) also called western worled milkweed, which contains a neurotoxic cardenolide ( pregnane glycoside)"
also
http://users.ids.net/~18james/rural/past.html
http://aria.arizona.edu/courses/arl642/cochise98/sonora/appendix.html

Sincerely,

Anthony R. Brach



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