I'm pretty much an expert and to tell if a baby chick is a rooster or hen simply you have to check if they have tails if they have tails at that age it means that their a hen if they don't have tails it means that the animal is a rooster. But the rooster also grows up to have a tail but doesn't...
I have two roosters the one i'm talking about is a Rhode Island Red the other is an Ameraucana which is known to be a easter egger too. And my rhode can also jump over a 8 foot fence cus I have one I had to go and find him but he doesnt do that anymore