I want to see more pics!
Comment about dying chicks for I.D. purposes vs. marking the shell: After the chick hatched out can't tell which shell it came from, so that only tell you which ones hatched, it doesn't help follow them later.
Example: I have Roo X, and want to see what his chicks turn out like from various hens. I have a Delaware hen, a light Brahma hen, and a Columbian rock. All 3 hens have similar coloring. I segregate the 3 hens separately, and collect the eggs, mark them so I know which egg came from which hen, then incubate them all together.
Once they hatched, I'd have no idea which is which. Except for part of the Brahma's chicks, the ones that got feathered legs, but some could be clean legged, so they'd mix in with the others, (unless Roo X was feather leg type, too, then, there's be no telling at all.)
However, if on day 12, 13, or 14, I very carefully, following all directions, keeping everything sterile, injected each group with a different color, I could easily tell them apart until they feathered out, by which time they'd be big enough to put identifying leg bands on. I could match the leg bands to the colors I dyed each group, too, so it would be easier to keep them straight.