Truth be known, I've given a calf immodium...I've tried everything to plug up a very scoured calf. Don't think it helped, however.
Anyway, I think it would depend on the size of the calf...how big is the bottle of immodium?
How bad off is the calf?
OK, to answer your question...if it were my calf, then it would be a baby calf. And, if it were my calf, I would probably pour about half of it down it's throat. But remember, this is if it were my calf. And, knowing what I know now after my little immodium experiment, I would forget about the immodium and get some spectam and give it 20ccs right off the get go, and 10 ccs twice a day.
AND, I would electrolyte and probios the crap outta that calf...this heat will kill a calf with scours real, real quick. And keep the calf in the shade, and mist it down with water regularly.
I've assumed a lot here...haven't I?
Alice