After you kick the cats, bend over so someone can kick you in the same place. You left the door open and the cats went in to check things out. Only doing what comes natural to them. But if you take the time to train them about chicks, the next time the door is left open you won't have to worry. I have two cats that are around my chicks all the time. One is indifferent to the chicks, the other is like an old mother hen propecting them. That cat will only let my dog or myself near the chicks. Ask my wife, she went in to check out a couple of sick chicks I had in the computer room. She didn't she Buddy until it was to late. He drew blood before she knew what happened. She will look around now vefore she enters the room. Buddy is actually her cat, but when it comes to a sick chick, look out.
If I ever learn how to post photos on this site, I will post some of him on guard duty and watching chicks on the floor. Someday he may make dinner of a chicks , but he hasn't yet.