Recently the last few batches of chicks I've attempted to hatch (by hen) have been failures. Most of the eggs don't have any chicks at all. Could the problem be my older hens? Or is my rooster shooting blanks? Our youngest hen just turned 1. The others are at least 1.5 all the way to about 4. I think the much older hens aren't laying anymore so doubtful that any hatch eggs have been theirs. Our rooster will be 2 in February. I have a neighbor friend who also has a flock and she has young roosters that she needs to get rid of by next month. Our rooster is not aggressive at all towards us or small kids, which I love. He is good with the hens besides one who went broody a few months ago and hatched 3 chicks (out of 10 eggs). I sent her to live with her chicks in my friends chicken tractor for a month and when she returned he would chase her away from food and at times attempt to attack her. That's the only reason why I'm considering replacing him but am really not sure what to do. I would hate for one of the young roosters to end up aggressive once they take control of our flock. Also, if I would replace him, do we give him away/cull him and then bring the younger one in, or have them together for a brief time? I appreciate any help! Thank you!!