Having recently spent a good amount of time inspecting two of mine that were supposed to be girls and are NOT, I would swear that is a pullet! Aside from the spurs she doesn't seem to have any signs (that I have seen on mine anyway, I am no expert though!!). Her comb looks pretty red, like she is ready to lay. Is it possible she is hiding them from you? One of my RIR went through a phase of hiding her eggs in a bush (until I found where she was laying them and then she decided she'd stick the the nest in the coupe), but until my discovery I thought she was not laying.