Corid is the brand name for the generic drug amprolium and has been around since the '60's. I have no direct experience using it. I considered using this as part of my Cocci regiment some years ago but my research indicated that it is as effective as Albon(Sulfadimethoxine)as long as it is used as a prophylactic.
Since Sulfadimethoxine is cheaper and supposedly as effective, I have decided on this instead. Again, according to my research and experience with Sulfadimethoxine, once clinical signs of Cocci are present, neither of these drugs are very effective and it is time to call in the big guns. My Vet likes to use PRIMOR (sulfadimethoxine and ormetoprim) in this situation. Others here have suggested Baycox (Toltrazuril) as an effective treatment post infection.
Additionally, Amprolium is a thiamine uptake inhibitor and could present a nutritional hurdle to a puppy that has clinical sings of Cocci if used as a treatment instead of as a prophylactic.
SBG, I realize that you were asking for a dosage suggestion and here I went off on a rant about the effective probabilities of different medications. Sorry.
***Edited By: DeputyDog on 7/7/2010 10:50:51 PM*** Reason: add
You can't win if you don't play the game -- Me!
All cruelty stems from weakness -- Seneca
Sometimes a dog is as good as any man -- Bell/Houser
I personally do not use corrid. but I know another breeder who does with good results ths i how she use it. 30cc of corrid in one gallon of drinking water, also adds 1 cup of sugar cuz it taste bad. offer as sole source of drinking water. she uses the 9% oral solution and starts as soon as the pups lap up water around 3weeks of age. She has no incidence of cocci since doing this. hop this helps :) She has een breeding FOREVER, i can give you her website in a pm if you want it which also as the recipe on it.
Well, lol, too late...had 7 healthy tootsie roll producers yesterday, 7 funny, smelly poopers today. Not taking a chance, they're on Sulfadimethoxine. Caught it early, but next liter I will use the corid as recommended. Yikes what a pain.... Gee other than that, the vet was pleased with the overall quality and health...21 days of albon. ..coming up!