I’ve throught about this myself because my chickens do not free range, but I sometime give them handfuls of grass that I’ve snapped off. I figured out that if I want to keep them from gobbling down the longer blades whole, I have to either hold the blades tight in my hand so they can grab and pull off parts at a time, or I have to break the grass up into pieces for them. I realized that when they are in the yard themselves, I think they grab and pull and that the grass usually breaks apart before they pull the entire blade out of the ground, at least that’s what I’ve seen when a couple of special hens have convinced me to let them have a moment in the yard. They may get the occasional long blade, but it seems that most of the time, they just keep pecking away at it until it’s all gone. Does that seem accurate? Or maybe my hens are just weird