If you want to mix them in with the older hens, have the chicks in a little chicken tractor(or separate pen)just outside the older flocks run, when they are old enough to be outside. You can put your chicks outside when they are about 3 or 4 weeks old, but they still might need a heat lamp.
Inhalation is the process of bringing air into the lungs while exhalation is the process of pushing the air out of the lungs. Inhalation helps the body bring in oxygen and exhalation helps the body expel carbon dioxide. Continue Reading.
Describe the process of breathing. During inhalation the ribs move up and out as the intercostal muscles contract and the diaphragm contracts and flattens. This increases the space in the thoracic cavity and air rushes in. In exhalation the ribs move down and in as the intercostal muscles relax and the diaphragm moves up as it relaxes. This decreases the volume and so air rushes out.