I agree with copper! My alpine last year had "off tasting" milk. I couldn't drink it once it was older than 24 hours old!!!!!
I chilled it the way you did so I knew that was right. I just figured that's how it was (first year milking). I started Copper this February and I love her milk this year
Sooooo much different than last year.
And I also empty the copper bolus into anything the goats will eat. Banana, Peanut butter sandwich....I have tried it all. Apparently I have some "diva" goats and they all have their own menu