Is it normal for new arrivals to not eat much?

The ladies, who arrived yesterday, have been doing an awful lot of moping in the coop today and don't seem to have really touched their pellets a lot this morning. I am wondering if it is just settling in, they don't like the feeder (a galvanised one with an umbrella, which looks pretty low to me), a severe dislike of noise (petrol lawnmowers and a spot of hammering), or gleefully eating the grass that (currently) adorns their run. Or possibly a combination of all four? Any suggestions?

Thanks - a touch of the newbie heebie-jeebies. It's just like having babies again...