Hi all. I have reached day 20 of my first ever batch of eggs in an incubator (apologies if I sound like a real beginner). I have 20 eggs in the incubator. One hatched today and 6 are pipping. However, one has pipped a triangle out of its shell but the membrane has remained intact below the triangle. Is the chick struggling to get through the membrane or is this normal? The others seemed to poke their egg tooth through straight away. ... I'm a real worrier :/. Thanks in advance for any help and advice.