On May 30 I bought some chicks and I was so excited about getting them that I forgot to ask their breed, gender and age. Is there any way to figure out how old they are? Here's a picture of them the day we got them. Anyone want to guesstimate? We suspect they are two different ages because 4 of them are about 50% larger than the other 3. Also, does comb growth indicate sex? Because some of them (even the small ones) have bigger combs than the others.