ohhh my husband checked the archive and yeah, there isn't an eastern dragon egg in that litter, it doesn't ping at all
tess dragon egg from 2018 (the one shown above)
what i think are the tess dragon eggs from this event:
meanwhile, the eastern dragon egg from the same 2018 staff litter:
and the chicken egg from that litter:
but, as i mentioned, the archive doesn't even show up with an eastern dragon in the event so far, so it's likely that both eggs are actually chicken eggs.