Came outside before daylight this morning and noticed one of my pullets was laying in the run. She was fine yesterday, but now can't walk. She hasn't started laying yet but should be soon. She is a red sex link and almost 17 weeks old. I also have a glw roo about 10 weeks of age that has been having wobbly legs for a while now. He stumbles and has a hard time getting back up sometimes. Any ideas on what it can be? I am hoping not mareks, they weren't vaccinated though. If it is, do I need to put then down and disinfect everything?