Check into what grass makes sense for your area though. Suburban lawn grass is not regionally appropriate for a ton of places which is why maintaining it is a butt. I'm sure they all have different nutritional content too.If you have the space to grow crops, sow grass.
This was written for dairy farmers, but the nutritional info about it is the same for anything that grazes (different species just have different requirements and ideal daily rations)
What do you think I should grow? Seeds, corn ect., or greens?