I heard that you need to be careful the pieces of grass are not too long because it can cause problems internally. That is the only thing I have heard about it. It saves me money I figure and is good along with the other stuff. I went to the Mesa Marketplace on Main st and I was able to get cucumbers 8 for a dollar and heads of lettuce 3 for a dollar. Good buys! my guys LOVE cucumbers. They also go wild for pieces of hot dogs as a treat. I buy them at Walmart for 99 cents. I do not let my guys free roam but I would love to find a way to attract more bugs to my cage area...LOL I tried your link, I am not aware of that site but I couldn't get the link to work. I would love to check it out, thanks!I am not sure how long after feeding them scratch it affects their metabolism, I just know it raises it. In my opinion if it has been working so far I would stick with it. All in all it sounds like a good idea to me. My coop is a deep litter type coop so I use my grass clipping instead of pine shaving in the coop and they don’t eat much of it, so far no issues. I have never attempted feeding it too them other than when they eat it from free ranging. I would consider grass similar to table scraps, but I have not read anything regarding the similarity or difference. If you find something out let me know.
Are you on http://www.phoenixpermaculture.or this is a great site for things local to phx area. Great resource!