We are wanting to move towards preparing our own feed for our flock, as opposed to buying commercial laying pellets. I plan to sprout some grain/legume/seed mix, and also feed some in dry form, slightly milled. I was advised to either mix a mineral supplement into the feed, or to offer one separately. I did buy a bag of livestock minerals recommended by my local feed store as they didn't have one specific to poultry. It doesn't contain selenium, which I know our soils are deficient in. Do laying hens need supplemental selenium? Our birds do free range and spend most of their time outside, but we do need to give them feed to supplement their foraging at this time of year.