I went to the feed store and asked for grower and the lady corrected me and called it finisher. I bought the 50lb bag and am now wondering if I got the wrong thing. Is there a difference between the 2 feeds? I thought I read where the finisher is for the chickens who end up as meat. I'm raising mine to help me in the garden and provide eggs. My girls are only 3 1/2 weeks old. Also, when should I start introducing their new feed? When do I give them grit? And, when do I give them oyster shell? Thanks!