I agree my hen was sitting on eggs. On day 21 there was a mishap in the nest box (ants) and mama left the nest for an unknown amount of time. I cleaned the coop and brought mama inside hoping the eggs would still hatch. I went to TSC for you know “stuff”and saw the babies. I felt mama deserved babies after sitting 21 days so I bought the minimum 4. When I got home 1 egg had hatched. I slipped the new chicks under her and she readjusted her position. 2 weeks later the TSC chicks are about a week ahead of the egg babies but all is good and I more babies then I planned. LolIf they look really young I would be tempted to try giving a few to one of those broody girls who is taking good care of her chicks. Guaranteed girls and variety in your egg basket...... You can sell some of your Australorps. Sorry, I'm an enabler