This is my 6th hatch in two years. I 've seen spraddle legs before, but I have a 2week old chick that was fine yesterday morning then lost the use of the left leg last night and tonight the other one is not working. I thought maybe it hurt it until I got in tonight and seen the other one not working. It is almost like the legs have just gone weak at the joints. It can't stand on it's own but does "walk" on it's "knees". Disease maybe? Contaigeous to the others? It's the only one doing this. The other 24 are just fine. Hate to cull it, but if the group opinion is that, I will.