I had 3 eggs due March 26th. All 3 externally pipped the night of the 26th. No real activity all day yesterday. On one, a pekin egg, you could see a dark shadow forming out from the pip & the duckling was actively chirping all day. This morning - still no progress - 2 are actively moving & chirping, 1 I candled & the pip is below the air hole...does not appear to be an internal pip or movement at this point. Should I be assisting the 2 and is the 3rd one dead?