I got 6 cornish rock chicks from TSC. I plan on keeping them as pets. I got 3 brown and 3 yellow. The yellow are growing alot faster than the brown. Also, how can you tell the gender at a young age? For any other breed of bird I have I tie anything metal on to a 6 inch string and see if it swings or circles. Will that work for chickens? Also, At what age are they usually full grown? And one last question.. How many eggs do they lay / month, and when do they start laying (what age?)?