Hi - noticed bloody poop in my almost 3 wk old chicks yesterday, one seemed a little off, started sulmet last night. The one that was off seems a little worse - standing & rumpled looking. People seem to say sulmet works fast so I'm wondering if there's something else I should be doing. Seems like it's still eating & drinking so should be getting the medication. I notice a few of them (including the sick one) pulling up on foot & holding it up curled for a few moments. What does that mean? Thanks!!