Hi, I need the dimesions to be about 71" by 19 " I was thinking about getting boot trays, if I got three of them and trimmed one done a few inches it should fit.

Is this a good idea? could I just lay them on the floor under the roost?
2Ameraucana Roo's
2BarredRocks 2PartridgeRocks
2Black Australorp.2Black SexLinks
8Easter Egg,5Ameraucanas
1White Leghorn,1Spec Sussex
2Guinea Royal Purples
2Peacocks India Blue/Blk Shoulder,1JadeSpalding PeaHen
2Royal Palm Turkeys