my 2nd hatch was a mess!!! finally hatched half on 25th day. opened some and they were dead but did not go through air sac. and some (last ones) have crooked crippled legs. some even were still attatched to yolk sac that was almost gone. i had humidity at 65 last 3 days. should it be higher closer to 70? my first batch was a breeze what could i have done different? i had alot more eggs in this one, maybe the time in hand turning altered temp to much. its a hova bator still air. any advice helps!!