Hi all! I have 5 bantam eggs in a Brinsea Mini Advanced Incubator. The eggs are set to hatch 6 days from now on Wednesday, October 8. Two days ago (8 days pre-hatch), and tonight (6 days pre-hatch), I am seeing eggs twitching. Is this normal? Should I be worried? The instructions say lock down at 18 days, which would be Sunday. Thanks!