I did a search, and found this.
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Albon, Sulmet, Dimethox are all sulfa's with not much difference between any of them. They all work well, with bonus's that they treat alot more than just cocci.
Corid must be dosed correctly, only used at treatment levels to work, which puts the overdose and the problems with thiamin/B1 polio, too close for comfort. It's like levamisole wormers, it's not going to kill the goat to overdose some, but a little over what they need, and you have twitching and foaming at the mouth, and very mad folks who you gave the instructions to! You also don't know if they are sending their kids out to do the doctoring, so it's better safe than sorry. I can't be there to know the person is weighing, weigh taping the goat, and not just guessing. Guess to heavy with your kids on Corid, or put them on it for too long, and you can have problems.
So it's one of those you give the information, but taking the time to write out all the problems with it becomes so time consuming, that it's eaiser to tell folks to use a sulfa. Corid is not a sulfa. It works in the goats system by only killing one specific lifecycle of the cocci occycyt. The cocci can't move from the unharmful lifecycle to the bloodsucking damage causing lifecycle without thiamin. So Corid which is a thiamin antagonist, limits this cocci's ability to absorb thiamin. If this continues for any length of time, or is given at overdose, not diluted correctly, it can cause thiamin defficency in the goat. You could dump sulfa in the water, give it every day, overdose it, and it wouldn't hurt anything. Vicki
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Vicki McGaugh
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Also, with a google search the signs of overdose were "loss of appetite, vomiting, depression, confusion, facial swelling, bone marrow suppresion, and liver disease"
Only the last 2 sound fatal, so you might get lucky. Good luck