100 is too high. Try to get it down to 94 or 95. At 7 days, you will want to lower the heat to 90. And each week after this, you will lower it by 5 degrees each week.
But I think it is getting too high at night and rising above 100 and they are over heating. I think this is what is happening.
But I think it is getting too high at night and rising above 100 and they are over heating. I think this is what is happening.

but the last two look fine and peeping for joy 
