I have 2 of the small Premier ones and 1 of the big ones. Yesterday, I moved 21 chicks that are 2-3 weeks old out into my old quail pen. The larger Premier plate fits in it perfectly. They were all cozy under it when I went to bed and all survived the night. They aren't straying too far from the plate today but it is still early. They have twice the space in this pen than they had in my metal tank brooder. This quail pen is the stop story of a double deck pen and I can look straight in and see the chicks under the plate which is nice. My family is happy that I moved the chicks out of the house this early. Of course, I currently have Pita Pinta chicks hatching in the incubator but I think that Chris is taking a few of them along with his Cream Legbar chicks that will hopefully hatch this weekend.