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CATTLE DEATHS FROM IVOMEC
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<blockquote data-quote="Ozhorse" data-source="post: 1156470" data-attributes="member: 18575"><p>I just had a read up on warble flies in cattle. We dont have them here in the Southern Hemisphere. If I was running cattle in a warble fly area I would use 'mectins each year at the suitable time so as not to have them in my cattle. The article I read was very clear that one would have to be careful about when grubicides were used.</p><p></p><p>The situation is similar in some ways to liver fluke here with sheep in that </p><p>AS Branguscowgirl said "You have really wormy cattle in front of you, what do you do? (Most people would worm them.)"</p><p>Once you had a warble fly build up in the cattle (like fluke in the sheep) it is a tricky and unknown situation to get them clean again.</p><p></p><p>My local private vet told me that he did not think that adult cattle in this area needed parasite control for fluke or nematode worms as they had no commercial effect on adult cows. He suggested I save money and not treat the adult cows. I followed this advice for two years and only treated young cattle. Then we got burnt out totally by a bushfire. Generous people took my cattle for me for some months. ALL usual stock work stopped , so the winter drench did not happen, while we did nothing but re-fence. It was a hard winter. The cattle did not do as well as the various people on different properties were expecting them to do. By early spring some thin young first calvers had bad lice. The older cows were knocked around too. I am sure in the circumstances they would then have been affected by fluke when they normally are strong enough to cope with them. How do you know in advance that your fat cows are not going to be doing it really tough six months down the track?</p><p></p><p>So everything appeared OK until something unexpected happens. THEN you should have already done the parasite control before the problem happened. No, the adult cows did not need parasite control here while everything was going normally but how does one know if something is going to happen?</p><p></p><p>And if I have found anything in my 7 years of farming, is that the unexpected happens more than you expect.</p></blockquote><p></p>
[QUOTE="Ozhorse, post: 1156470, member: 18575"] I just had a read up on warble flies in cattle. We dont have them here in the Southern Hemisphere. If I was running cattle in a warble fly area I would use 'mectins each year at the suitable time so as not to have them in my cattle. The article I read was very clear that one would have to be careful about when grubicides were used. The situation is similar in some ways to liver fluke here with sheep in that AS Branguscowgirl said "You have really wormy cattle in front of you, what do you do? (Most people would worm them.)" Once you had a warble fly build up in the cattle (like fluke in the sheep) it is a tricky and unknown situation to get them clean again. My local private vet told me that he did not think that adult cattle in this area needed parasite control for fluke or nematode worms as they had no commercial effect on adult cows. He suggested I save money and not treat the adult cows. I followed this advice for two years and only treated young cattle. Then we got burnt out totally by a bushfire. Generous people took my cattle for me for some months. ALL usual stock work stopped , so the winter drench did not happen, while we did nothing but re-fence. It was a hard winter. The cattle did not do as well as the various people on different properties were expecting them to do. By early spring some thin young first calvers had bad lice. The older cows were knocked around too. I am sure in the circumstances they would then have been affected by fluke when they normally are strong enough to cope with them. How do you know in advance that your fat cows are not going to be doing it really tough six months down the track? So everything appeared OK until something unexpected happens. THEN you should have already done the parasite control before the problem happened. No, the adult cows did not need parasite control here while everything was going normally but how does one know if something is going to happen? And if I have found anything in my 7 years of farming, is that the unexpected happens more than you expect. [/QUOTE]
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