Every time the door to the house or garage door opens the chickens start squawking loudly. I have 5 and they are in a 12 x12 run but they get to come out in the afternoon and free range. If they don't get let out they are very noisy and pace back and forth squawking. Also it's like every time they see us they think there's snacks...maybe that's why they are load. Is there any way to stop them from doing this. Should I not give them snacks anymore? Any ideas