I wouldn't totally count on the chest bumping to determine the sex of a chicken @HappyClucker7. I have had a couple of hens that actually chest bumped a full grown Rhode Island Red rooster when they were young pullets. LOL! I hope to reintegrating my rooster with the hens soon @tigger19687 so I may be able to provide some barnyard mixed eggs. I have 3 BO hens that go broody for a little while but forget all about the eggs when I toss out a handful of scratch. I still have 2 RIR hens, 2 Br's and 3 Columbian Wyandottes. All big girls since my rooster is really big.