You don't have to, if it's not important. I'm just going to say the hen is between 5 - 6 months old. Rhode Island Reds and Barred Rocks both lay brown eggs. Sumatras lay white eggs, and Jersey Giants lay brown, so if yours is a cross between the two, I'm not sure what the egg color would be.I considered that when I noticed the size but I wasn't sure. Oh and I forgot their is also a Road island red who is with them. I should probably isolate her to find out.