It was a pain to get my juveniles in with the adults. I too second waiting until they are similar in size. Even then, the adults still gave the young ones a hard time for a bit, but since they were bigger, it wasn't as likely to end in injury.
I would do a small safety hole in it. But also be aware that often if they can't externally pip, there could be a problem with the chick. It might just be a simple malposition, in which case no issues, but it also might have problems that would result in you having to cull.
Or maybe it's just a...
Pulled two chicks out of the incubator tonight, got a third egg whistling :) One little female is going to a home with a yearling male that needs a friend. Looks like two girls this time so far, which helps balance out all the boys I've been hatching! So many boys this year.
Did some whistling at some eggs tonight. Got some wiggles from a possible blonde egg. Had to pull another one though because it reeked :sick At least I caught it before it leaked!
I did some whistle testing on two of the eggs that are due the 28th. Both moved! Hoping for a good hatch - and no power outage during this storm, darn it!
My goodness, the seller I bought from (I buy from her every year, she actually was here on BYC at one point) emailed me today and said she sent me out two replacement eggs for the cracked ones this year, PLUS three more that she thinks her male might have sat on for a day or two so she didn't...
I use Poulin Grain ratite, but that's more of a small company so you likely won't find it outside of the northeast.
Kalmbach makes a good one too! And you can buy it from Chewy, believe it or not.
I do the same thing every year, lol. In fact just today my chance of blonde/white eggs got here. Mostly I'm trying for a white at this point, haha.
Darn post office cracked two of the eggs though, sigh. How they even managed, I don't know.
Well, I have three more babies from the next batch of eggs! Woo!
Also got one more out of the power outage eggs, but it is not well. Very sticky and didn't fully absorb the yolk :( We will see how it does but I'm very guarded about its prognosis.
https://www.backyardchickens.com/threads/pyxis-emu-chat-thread.1221896/post-25654418
Very good, actually. I grabbed another pound from him when I picked up all the chicks he had last year.