ok, well if you want to just double check here is a site where you can:
http://www.aav.org/search/custom.asp?id=1803
also, please be sure the flooring is non slip , looks like it's in a Rubbermaid container type deal....perhaps that's just temp., hope so.
You can cover the bottom with something that will not be slippery ( and won't move around like shavings ) like indoor/outdoor carpet but those chicks need more room than t be in one of those containers.
Also, if it's warm enough for you to go outside barefoot then those chicks can be out in that weather too.
They always need plenty of room to run, fresh air and sunshine, enough warmth and try and keep the protein down in the feed to below 20% if you can.
Vitamin supps. added to the water and/or food that have a lot of various B types are very good for bones, etc. and maybe would help that hock heal a bit.