I screwed mine in just in case I have to move them. Sorry yours got hurt, hope they are ok.Aw man, I totally suck! I clipped the girls' wings yesterday and you know what I realized? Their poop shelf and roosts are way too high now! They can't get enough lift on the way up or down, so they are majorly struggling to get up there, and when they jump down they have no wings to catch them on the way down so they slam into the shavings on the floor. Good thing it's deep litter but my 2 babies look to have injuries to their beaks or combs right by their nostrils, so I think they hit the ground hard. Now I have GOT to figure out a way to lower that shelf TOMORROW before someone gets really hurtI hope it's screwed in, not nailed...but I think it's nailed.