I purchased a 50 pound bag of multi-species feed (12% protein) from a local farm shop (CAL Ranch in Layton, UT). It appears to contain 4 grains: cracked corn for sure, likely alfafa pellets, possibly wheat seeds/grain, and possibly oat grain (last three are my guesses). The ingredient lists just mentions, "grain products". Here is a link to what I think is the product (brand/description is correct, but the picture of the bag is different).

http://nutrenaworld.com/nutrena/products/more-species/all-stock-feed/index.jsp

Anyway I added some to about 1 square foot of an open dirt area and about 1 week later some sprouts are appearing. The sprouts are all the same: dark green and grass-like (straight-veined), but slightly broader (roughly a 2-3" tall sprout with a width of 1/4"). I googled wheat grass and as far as I can tell, it is a match - but I am not sure.

My concern is adding this to a lawn and introducing this sprout as a weed. I have read that corn doesn't survive one mowing on this forum, but I don't recall any threads regarding wheat (potentially) as a weed.

Any advice?