Is that what they are.

They're after something under the plot edge and under the plants from what I could see. No sign of them being interested in the plants. YMMV.
Stuff they don't eat one months, they eat the next. In general these two and the rest when they were alive haven't shown much interest in any of the flowers there are at the field. However, it seems some flowers encourage ground life that the chickens eat and that usually involves a bit of digging.
I would frame anything new planted to let the roots get well established.