I had my outside hose spigot connect so it bypasses the water softener...just my well water comes out of there.
Rain barrels are a big point of discussion in organic gardening...the consensus is that rain coming off an asphalt roof is not okay for food sources (animal or vegetable) because of the tar and associated nasty chemicals that leach from shingles. Asphalt run-off should be used for non-edibles only. I collect rain from my green house roof for edibles, but still give the chickens fresh water every day. So easy.
It's so easy to do the best thing for your critters.
This thread reminds me of someone who feeds her dogs old, stale, spoiled food she collects from others. My response? I love my dogs (and chickens) more than that...
Diana