i have had great success with sulmet and it is easy to find.
I would not wait till Monday.
Are these people new to goats?
If possible I like to give probiotics before they leave the farm. Changes affect some animals more than others.
I don't like to medicate unless there is a reason but with baby goats cocci can come on fast and furious. I always have a sulmet supply on hand.
Not all diarrhea is cocci though.
Without knowing important things like is the kid running a temp or not and what the diarrhea is like.
Bright green, yellow, dark and foul smelling. These are all things that need to go into deciding how to treat.
But treatment must begin now. Little ones can fade fast.