The thing that defines chicken-ness is crossing the road. So if the egg rolled across the road before hatching does that mean the egg is a chicken egg?

But of course the chicken must also see the other side of the road. Since it's impossible for see outside of the egg before hatching it might be the egg lacks sufficient chicken-ness to be considered a chicken egg.

But once the egg hatches the chicken will see the other side of the road. So if the egg crosses the road and the chicken that hatches from the egg sees the other side of the road, both the egg and chicken must both be considered to be sufficiently chickenly to complete the sequence required to establish the complete chicken.