Just a couple of items: Need to consider the water delivery method (troughs/nipples/bowls) and, more importantly, how much water is being consumed, daily, by these 45 hens - put out x amount in AM and - by volume/wt. - how much is missing 4 hrs later (med linked to mentions that med should be...
Apologies for any misunderstanding about the "lurking", the comment was merely a friendly "whistling" you "onboard" as a newly "registered" member.
Reason I asked about the info on the powder purchased has to do with unregulated manufacturers, Chinese primarily, and quality control issues...