Nah! They'll overcome their fear and curiosity will win out. One of the braver chicks will check it out, and when it doesn't eat that one, the others will come around too. Then, they'll enjoy the extra space! My youngsters are the same way. Put treats in a bowl and put that in the run for them, and it's a MONSTER! Soon, though, my Brahma that I think is a rooster will check it out and start eating. The others come over pretty quickly then.