I got my chicks 4 days ago, they are a little over a week old I think. I wanted to change the litter in their brooder, (it's just a circle of cardboard) so I scooped them up and put them outside in the cardboard and let them peck around. They absolutely loved it! They couldn't have been out there longer than 15 minutes max while I swept up the litter & changed it and their water, then I put them back inside. Are they too little for that? Did i just condemn them? I'm freaking out that they're all going to get sick and die now.