Yes, it's fine. If it's been less than 24 hours than it just isn't ready yet. They pull on one another's fluff all the time, might as well get the little one accustomed to it now. He'll get his revenge...haha.
I do not worry when chicks are pipped unless it has been a long time with no progress at all. I also assist if they are having trouble while zipping, because that's usually due to having issues maneuvering inside the shell.
Last time I had one that had pipped and sat with his beak sticking out for a long time. I left it overnight and it was dead in the morning. I was so upset, but when I opened the egg the baby had a deformity so I was grateful that nature took care of it for me. If I had helped that baby I would have had to cull it myself and that would have been infinitely more difficult.
Lookin good! Looks like the start of a zip. Taking it's sweet little time isn't it? Some can go from pip to zip in no time, and others will take its time. They will zip all the way when they are strong enough, and they are strong enough when they have absorbed all of their blood, and their yolk, then they go to town!
Alright, thank you. The one that has already hatched is running laps around the 'bator, while making pit stops to help the other little guy. Still nothing from the other 6 eggs that are in there though...