Horse
Can Sheep Eat Horsetail?
All horsetails are poisonous to livestock; cattle, sheep and (ironically!) horses. Horsetails contain the enzyme thiaminase, which is also found in bracken, which destroys vitamin B1 (thiamine). Is mare’s tail poisonous to animals? Mares Tail (Equisetum palustre) the Facts Equisetum palustre is poisonous to herbivorous animals, but not to humans. Read more…