How to identify chicks without leg bands?

[ABS9590]

Also not a fan of toe punches or wing bands.
Nail polish?
Paint pen?
I'm trying to keep track of different lines and hatch dates until they're big enough for a permanent leg band

 

[TwoChicksChix]

I use the tiny rubber bands that are used to tie horse hair. Can get them in a few different colors and they can be really tiny.

 

[ABS9590]

I might actually still have some of those! Thanks!

 

[TwoChicksChix]

I mostly use them to determine sex of my chickens when they’re young and see if I’m correct once they get older.

I find some of the bigger ones can be put on 8-10 week old chicks and won’t cause problems to the chicken until after they’re 18 weeks. By then I can usually determine gender and remove them.