Aren't they just.

Worse, it changes with the seasons and the weather.
The field lot have been on a type of grass, I think it's a grass, that grows in the abandoned/not managed plots. There are three at the field currently and they all produce this particular plant. Usually they snack and move on but the last few days when they get to one of these plots they are there for quite a while stripping the seed from the plant. The green short grass on the paths around the plots they're not showing that much interest in which during spring and winter they have in the past eaten a lot of, particularly before roost time.
They won't touch the long clump grass that grows at the goose end of the extended run and that's mostly all there is in that area.
I've found myself wishing I knew a lot more about what these plants are and what nutrients they contain. Some grasses have a higher protein content than the standard 16% that we get in the UK.