In one sentence, describe what the following article is about:

If a chicken is crying loudly and repeatedly, it means it has been captured and is being taken away. The chicken is alerting the others in the area to beware and saying "Let go!" If you are the one carrying the chicken away, be careful because the distress squawk might embolden other chickens or the rooster to attack you to save their friend. Be prepared to protect yourself if necessary. Sometimes a chicken will let out just one loud distress squawk, which usually means it's been startled or unexpectedly pecked by another chicken. Check on baby chicks making distress calls. If you hear a baby chick make a loud, sharp tweet, it means that it is in distress. Check to see if it is too hot, cold, or hungry. Any of the chickens who sense danger in some way will raise an alarm. They will make a loud, repetitive cackling noise that sounds like "kuh-kuh-kuh-KACK!". The other chickens will then seek shelter. If you hear the alarm cackle, be sure to check on the chickens to make sure there isn't a predator after them. If your rooster is making loud squawks while looking at the sky, he is letting the others know that there is a raptor or other dangerous predator in the sky above them. Be sure to check on your flock if you hear this sound. If the rooster raises too many false air raid alarms, the chickens will start ignoring the signal. Sometimes the rooster will make a slightly softer "chirrup" sound as it looks at the sky. He is indicating that there is something in the sky, but it is probably not dangerous. Hens will make a soft "errrr" sound to alert their chicks to danger. You can mimic this sound to achieve the same result. Be sure to keep your voice soft and vibrate the sound like you are humming with your lips open and your teeth closed. When the chicks hear the sound, they will run for cover under their mom's feathers or flatten themselves against the ground to hide.

Summary:
Recognize the distress squawk. Check on your flock if you hear an alarm cackle. Listen for the rooster sounding the air raid alarm. Use the hen's hushing sound to get chicks to run for cover.