I follow instructions per sproutpeople.com for my wheat grass. VERY easy to grow... actually too easy because I have too much ready right now.
I initially sprouted organic scratch grains but I also wanted to be able to provide them with a steady supply of fresh greens to their diet. I experimented by spreading a bunch of boss/scratch mix in the sand run and covering with mesh until there were about 3" of grass, and they annihilated every shoot, roots and all. That still works in a random sort of way where they come across something that managed to sprout on their own. I don't spread them out like I used to to avoid attracting pests so now I'm on to sprouting indoors.
Like I said, I use the instructions per the above website, and so I have 4x4 trays set up to sprout wheat grass in a soil less medium (baby blanket). This lets me grow 6" of grass that I harvest for the girls, and I can also pull out the remaining seed & root structure cleanly out of the baby blanket and feed to them as well. I cut everything with scissors (about 1") before serving. You can also leave the cut portion in the medium to grow a second time for a tougher stalk. I'm going through my first crop and they love it. My next batch I'm going to stagger 1 tray every few days so that there's a fresh batch ready every few days.
There's really no reason the same principles can't be used for other grains as well. The detail they provide has proven to be extremely helpful.
My routine for grains (not boss) is soak overnight in plenty of water (8-12 hrs),
Rinse well, and DRAIN well to almost dry. Can't stress drain/ventilation enough. My second crop is already looking better due to more drain/shaking.
Repeat rinse/drain procedure 8-12 hours (before work, after work) 3-4 times until there are short root stubs
Plant in a medium, covered, rinse/watered every 24 hours until 3-4"
Uncover and water every 24 hours.
I basically tend to it briefly twice a day until I get the desired result. I do like the baby blanket as a medium, no mess other than water to clean up on the counters.