 They poop and they walk through it. That's not tidy. Now, when it comes to this time of year, though, as the heat rises, they get warm. Chickens, like many other farmyard animals, can't sweat. So if you see your chickens kind of beak open, gasping for air, they're looking for some cooler weather. And one option to help cool them down is with water. They really need to drink cool water to bring down their body temp.