I am currently renovating an existing coop for my new little flock. They are 7 weeks old & include 2 Silver Laced Wyandottes, 2 Speckled Sussexes & 2 Easter Eggers (1 of which may need to be rehomed cause it's looking like it's a cockerel.) I would like to build some roosts with poop trays underneath (preferably removable) in the reno'd coop. (The former coop had no roosts.) I would also like to utilize the space under the roosts, but am wondering how much that will actually be once I add my deep litter. I was thinking that the birds likely wouldn't be able to jump or fly very high (not now nor when they are full grown) in the approximately 30" clearance area that they have & had thought to put the first roost around 2ft off of the "ground" (top of litter), but that doesn't leave a lot of space to utilize underneath. Can I go higher? 4'? Any thoughts or experiences you'd like to share would be appreciated.