help! pipped

Hello can anyone tell me if this egg looks like it is pipping? Also what if this one hatches will my chicken still sit on the others

I am crazy worried........I have 3 wild rescued mallard eggs...1 egg has successfully hatched at 7am today......2nd egg made small external pip at 5pm yesterday - 6/24.......hole is now the size of a nickel. I can see the beak moving and breathing and a few faint chirps..but only a few. It...