Good Morning and welcome. I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
The best and most effective way to treat Coccidia in calves is Corid. This LINK will tell you how much you will need depending on the number and weight of the calves. This can be purchased at the farm supply or online stores.
The dose is on the label and it will require a 5 day treatment but after using this, your calves will be free of this disease.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please Reply so I can clarify for you
Sincerely, XXXXX XXXXX
Thank you so much, Paul for your kind rating. It is very much appreciated! Even though you have rated, we can still communicate. If you have other questions, please Reply. I am always happy to help.
Have a great day!