hi. we are first time chicken owners and when purchased were 99 percent guaranteed they were all laying hens. they are about 4 1/2 months old and one is laying eggs already. just cracked an egg open for the fist time this morning and from what i've read online, it looks to be fertilized which i'm hoping is not the case. is anyone able to tell me what breed and gender our 4 chickens are, it would be much appreciated. attached is a picture of each chicken numbered 1-4 rather than their names.