@ravenvalor
WoodlandWoman has given you great advice. The best thing to do is lure the chickens. Do NOT chase them and do not EVER allow someone else to chase them.
I keep mine loose as well. I also have a "call" that I use when I feed them. I do this every time so that when I want them to come eat, or when I want to count them, or catch them, they come.
If I want to catch them -- and this is what I'm recommending to you --
1. I feed them, at my feet. I let them gather all around me. The closer I put the food to my feet, the closer I get the birds to me. I may have to scatter a small amount of food further out, but the bulk of it close to me.
2. When their heads are down, and preferably tail toward me, I slowly bend at the hips, and then in a very SWIFT move with one hand I grab the tail.
3. Then I land the other hand on top of their back pressing them down to the ground so that I can get a better grip.
Now, my "method" may sound a bit different, but only one of my hands work -- and that is my grabbing hand. Interestingly, I can catch a chicken better with one hand, than others can with two. Grabbing the tail is not something I would have done except for the one hand issue, however, it works quite nicely. I don't hurt them, and I don't yank out tail feathers -- I grab round the tail right where it connects to the body.
If you have already frightened your birds today, you may have to wait until tomorrow. Just remember to never chase them. It accomplishes the opposite of what you want and you and your birds could get hurt.