I don't know what others will say but I think unless you really see a problem, the goats are going to take in what they need. I do have days where my goats hardly drink any water at all and other days I'm refilling their buckets a couple times.
When my goats are outside, they prefer to eat snow over drinking from the bucket.... I just chaulk it up to them liking a frozen treat as much as I do! Seriously, who DOESN'T like a snow cone?!?
My goats eat snow too. I would'nt worry about it. Like Karen stated goats are pretty good about getting in what they need. Just make sure they have loose goat minerals and fresh water out and they will take it as needed.
Water is not a main source of mineral intake for goats. So I would'nt worry about that information about mineral loss from eating snow. Ive actually never heard of that theory?? Even snow carries some minerals so how could it make them lose minerals?? IMO.
I would'nt concern yourself with snow chomping!!! Just remind them to watch out for that yellow snow!!!