We bought 48 fertilized eggs from a supplier. Has some problems keeping the temp right in the Hovabator. Only 23 hatched most a day late. Of the ones that hatched about 10 have died. They go lethargic, some crooked neck, others just falling over and laying on heir side. Hard time breathing. No coordination. They have medicated chick starter. Nutrition enhanced (electorlyes, vitamines, etc.) water. No exposure to otehr chicken or equipment used with other chickens. I've tried hand watering and hand feeding. Nothing seems to work. What's happening? Help!