Make sure you know what percentage of amprolium it is, and research the dosage. I have Corid like this - Merial 150197 Corid 9.6% Oral Solution for Calves Yellow, 16 oz https://www.amazon.com/dp/B00M1UPA6G/ref=cm_sw_r_cp_api_i_dYmoDbK498V8N

But mine doesn’t specifically say for calves. But it is the 9.6%, and I followed this dosage instruction page: https://www.backyardchickens.com/threads/updated-corid-and-amprol-amprolium-dosing.818879/