Hey all. I have a batch of French black copper marans in the incubator. Out of 12, I pulled 4 at 2 weeks. Today and yesterday 7 have hatched and the last one is working very hard on it. The last is having trouble I fear though. I can hear it chirping through the egg and feel it jerking around. I added a safety hole about an hour ago because it had internally pipped at some point before yesterday morning when I candled it. The chick is now sticking it’s beak through the safety hole but can’t seem to break the shell. At what point should I assist further? I’m always weary about helping because everything I have read says it should be a last resort.