Curious question... I see a lot of warnings not to use 'pullet eggs' to hatch and in my mind think of that to mean the first eggs that a hen lays. All of my chickens have been laying 3-5 months now and are 42 weeks old. Their eggs were smaller the first month or so that they laid, but have been consistent in size since then. This weekend, I let a broody who proved herself on golf balls, have a few of the best looking eggs. I wish she had waited another month or so to go broody, but this is what happened. This is already her 3rd or 4th time to go broody, so I have a feeling this may be her thing (she's a silkie). So, do all of you wait until your chickens are at least a full year old before hatching their eggs or have you used them a bit early, like I did? We'd like to add more breeds with hatching eggs later on, but certainly felt like it would be wiser to practice on our own "free" eggs to let the broody prove herself first.