I wouldn't. It can damage their liver or kidneys and there's something else it does. I forgot. I wouldn't feed them layer until they actually start laying.
Don't do it. Layer feed has more calcium and should not be fed to young chicks. I made this mistake with one of my hens, and she had alot of problems later in life. She died as a result, at only 4 years old.
a no no, it does not have the nutrients and vitamins the young ones need to grow correctly...its like giving a newborn baby steak...not healthy, they should be given chick starter for 18 weeks till they come to POL