I am BRAND new to this and just wondering what I am looking for. I have 7 eggs I bought off E-bay for my Japanese Bantam. Today is day 7 for my eggs under my broody chicken. Egg# 4 eggs real veiny & 5 others are solid looking. Then #7 is just empty looking. Now I am candeling with my kids princess flashlight too....best flashlight in the house Any tips on candling or what am a actually looking for in my eggs???