Hi, I was candling one of my eggs that I am hatching and was surprised to find two embryos moving around. I know one might be the yolk but after a few days i candled it again and I saw two chick embryos moving and could plainly see the yolk. Yesterday I started noticing on the outside of the egg dark to light streaks like something is tearing or ripping apart, almost like the membrane and the egg is a little bigger than it was. Is this normal with twin chicks hatching or is it something i should be worried about? Its my first twins hatching and Im kind of nervous about it. The twins are still alive and moving even though this is happening. Thank you.