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Calves Gain Better
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<blockquote data-quote="City Guy" data-source="post: 1345508" data-attributes="member: 25547"><p>Aren't there such things as parasite resistant cattle? I'm sure there are. I know several breeds of sheep (Katahdins, especially) are highly resistant to internal worms. And I have read articles about producers who never have to worm or even treat for flies because they have selected breeding stock for genetic resistance. Greg Judy says "You're better off to just sell your wormy cows and their calves." Many producers just treat the cattle actually infested and not the whole herd. That makes sense to me. In addition, I have read about some things that can help:</p><p></p><p>1. Frequent pasture rotation. Move cattle (and sheep) in three days or less to break the cycle of the horn fly.</p><p>2. Then move in the chickens to pick off the larvae. </p><p>3. Graze sheep and cattle together. Worms that affect sheep do not affect cattle and vise-versa. When a cow ingests an egg there is reasonable chance it's harmless. Same for the sheep.</p><p>4.Never graze closer than 4". Worms seldom deposit eggs above the 3" level.</p><p></p><p>Parasites develop a tolerance for the chemicals and thus get stronger while the livestock get weaker. Seems to me it ought to be the other way around.</p></blockquote><p></p>
[QUOTE="City Guy, post: 1345508, member: 25547"] Aren't there such things as parasite resistant cattle? I'm sure there are. I know several breeds of sheep (Katahdins, especially) are highly resistant to internal worms. And I have read articles about producers who never have to worm or even treat for flies because they have selected breeding stock for genetic resistance. Greg Judy says "You're better off to just sell your wormy cows and their calves." Many producers just treat the cattle actually infested and not the whole herd. That makes sense to me. In addition, I have read about some things that can help: 1. Frequent pasture rotation. Move cattle (and sheep) in three days or less to break the cycle of the horn fly. 2. Then move in the chickens to pick off the larvae. 3. Graze sheep and cattle together. Worms that affect sheep do not affect cattle and vise-versa. When a cow ingests an egg there is reasonable chance it's harmless. Same for the sheep. 4.Never graze closer than 4". Worms seldom deposit eggs above the 3" level. Parasites develop a tolerance for the chemicals and thus get stronger while the livestock get weaker. Seems to me it ought to be the other way around. [/QUOTE]
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