what do the red and green spots mean on the packing peanuts' heads?

[eventmerlin]

Ok so I got a bunch of packing peanuts with red and green spots on their heads. What do they mean?

Also does anyone know what breed of chicken mcmurray usually uses for packing peanuts? They are Yellow chicks.

 

[speckledhen]

Usually, they mark the cockerels in green. Could be red, too, but not sure. I'd think you may have two different breeds of young roosters. Almost all packing peanuts are cockerels. I've seen them from Ideal with the green marks for the boys at the feedstore.

 

[nanawendy]

They are ready for the red light green light game... No really probably identification

 

[Tam'ra of Rainbow Vortex]

I ordered from mcmurray and they just sent me a few extra of breeds I ordered (though I think one was an accident as they doubled my number and I got all pullets!) But I ordered the right number so I shouldn't have had any extras!
Oh, andd mine were unmarked. No spots at all!