| Author | Message | ||
     Maggie Leman Moderator Username: maggieleman Post Number: 1720 Registered: 07-2005 Posted From: 72.185.188.253  Rating: N/A |
It has been found pastures really need to lie unused for at least a year for paraistes to die. The barber pole worm is very very hardy. the other option for cuting the egg load on a pasture is to graze another animal who is not efectd by the same parasites over it. this would be either cattle or horses, sheep share the same parasites. Maggie Leman Goat 911 Capri Medic | ||
| Don S. New member Username: don_s Post Number: 7 Registered: 01-2007 Posted From: 172.146.127.81  Rating: N/A |
>Those older animals are shedding eggs from their very resistant worms and the younger animals are picking them up...< I think that is why the Valbazen becomes less efficent on the young kids after several months of aging. Another thing came to mind concerning leaving pastures idle long enough for the parasites in them to die off. I am thinking winter time is good to leave pastures idle since the herd is staying mostly in the barn. But the parasites are pretty well dormant while this cold. My question is do they age out and die while in this dormant state? If not, I would then think that pasture rotation works only during a specific air temp range and moisture level. | ||
| Maggie Leman Moderator Username: maggieleman Post Number: 1716 Registered: 07-2005 Posted From: 72.185.188.253 Rating: N/A |
Hard to say what might cause your worms to become resistant, Cydectin and ivermectin are in the same class essentially, worms resistant to one will be at least partially resistant to the other. But as you can see your worms are building resistant because at least one of your dewormers isn't working anymosre. Now if all of your goats are together they are being infected with the same worms. Those older animals are shedding eggs from their very resistant worms and the younger animals are picking them up... Maggie Leman Goat 911 Capri Medic | ||
| Don S. New member Username: don_s Post Number: 5 Registered: 01-2007 Posted From: 172.132.31.208 Rating: N/A |
Maggie, would my current method cause extra resistance problems? On young kids I like to use a mild wormer like Valbazen, also because it rids of tapeworms. Once they get around 10-12 months I switch to Ivomec. Also use Ivomec on the young adults. A few older adults I can use only Cydectin on them because the other wormers no longer effective for them. | ||
| Maggie Leman Moderator Username: maggieleman Post Number: 1713 Registered: 07-2005 Posted From: 72.185.188.253 Rating: N/A |
The current recommendation is to change the class of dewormer you use every year to 2 years. If you rotate every time you deworm, the worms thqt survive a full rotation will be resistant to ALL of the dewormers you used. Rotating yearly or every 2 years is what they are recommending when they teach the Famacha method of parasite control. This method uses selective deworming, meaning that only the animals that need deworming are treated. This is done by assessing the level of anemia by looking at the eyelid's mucus membranes and treating at teh point where the goats is anemic but before the goat is actually sick. Routine fecal egg counts (fecal exams) are done to assess how well the dewormer is working. if you get a chance to take the Fsmacha course do it! You will learn how to save money, save time, save work, and save your goats. Routine whole herd deworming is not working as well as it used to, and we are running out of effective dewormers with no new dewormers coming along. Maggie Leman Goat 911 Capri Medic | ||
| Gary Pfalzbot Board Administrator Username: admin Post Number: 103 Registered: 07-2005 Posted From: 67.142.130.26  Rating: N/A |
Rotating wormers can be a good practice if you live in an area where worms and parasites are an ongoing problem. If I am remembering all this correctly, continued use of the same wormer (or same class of wormer - Fenbendazole for example) causes the worms to buildup a resistance because it is really the only toxin they need to buildup a resistance to. I don't know how long it really takes them to buildup this immunity but their own physiology is able to adapt in stages and rotating the wormers helps switch on and off this adaptability trait. The life cycle of these worms is such that the first cycle of worms is introduced to one class of wormer, lays its eggs, begins to adapt to that class of wormer but dies before the cycle is complete. So when the remaining eggs hatch, they will have just a small bit of resistance that was passed on to them and if they are able to hatch, those eggs will likely carry the same resistance. If a different class of wormer is introduced, they will have to start adapting to a new class of wormer. That's pretty much the rule of thumb that I know but I also know that it is always different depending upon where you live. The one thing that I firmly believe in is the use of minerals that "assist" the wormers in doing their job. Iron and copper are very good in keeping worm loads down because these internal parasites have a difficult time thriving in a host that has higher levels of copper and iron. Best regards, GP Gary Pfalzbot, GoatWorld | ||
| Megan Schefke New member Username: schef1mm Post Number: 65 Registered: 08-2006 Posted From: 64.105.216.245  Rating: N/A |
I've heard to stick with the same wormer until you notice that it isn't working anymore. This way the worms don't become resistant to numerous wormers so quickly. Megan | ||
| Jeffery Allen Brumfield New member Username: jeffro518 Post Number: 62 Registered: 01-2006 Posted From: 74.34.135.61 Rating: N/A |
I have heard that after a while a goat can get use to the wormer after a while. I have used the ivermectin wormer for about to years it has worked great. Should i change or not and if so to what one. thanks |