Can / Should I feed same food year around

[NCFF]

I'm a little concerned about feeding hay to and for that reason. since it says they like short grasses, but I am looking into hay. I always fed pellets but in spring when my chickens and ducks are hatching the babies can't eat the pellets so I switched to the cumbles and everyone eats them, because of my feeders I don't think they are wasting much of it by getting it on the ground. Especially the chickens because they can't get into the feeders and scratch it out. You have to special order? and here you can't get anything but Purina.

Everybody has the crumples . I prefer pellets for anything other than babies.