This is the general information I found and have believed... A pullet is a young chicken, more specifically a hen (female) at least 20-weeks-old which has begun to lay eggs but has not yet moulted. Pullets are more productive than the older laying hens; they often produce eggs for an entire year, while hens will lay for six-to-seven months. this is what I found in the learning center 1. Should I buy pullets or straight run chicks? top Pullets have been sexed by the hatchery and are usually sexed 90% accurately. Most hatcheries or feed stores will refund your money or buy back the cockerels which exceed 10%. Straight run chicks are usually less expensive, but they are 50% pullets and 50% cockerels (more or less). And in looking to buy them I have also read chicks refered to as pullets. I am not looking to raise chicks and would like to get them a little older, which is what I thought pullets were but now Im confused.