So I'm a kid, and you know how kids are... stupid. I took my chicks outside to play with. I had gotten the chicks from my science teacher so I didn't know exactly how old the were. I was guessing they were at least older than a week. On one of the pages here, it said that it would be ok to take them out to play and explore about after a week old. When i took them in after playing they were fine. But the day after, when I had come back home from school, I saw that they were constantly shaking their heads. It wasn't like a calm nod, but like a vigorous 'no'. It scares me. I first noticed it happen when my chicks resided in a styrofoam box (I never closed it). The heat was just right, but I thought it was too bright cause of the white styrofoam. So i decided to move them into my old hamsters' cage. I use a 100 watt light bulb, not a heater thing.. But they still shake their heads. I also make sure that i change their water and pine shavings daily or when it becomes too dirty. I also provide them access to food 24/7. I had the cage in the living room, which was a little noisy, so i moved them to my room. I have no idea what to do. I think that they are dying. I also believe they are sick. I do not know if I should take them to the vet (I'm a kid so I have no money to spend). I think i am giving the what they need. Before they started shaking their heads, i would play with them quite a bit, but not too much that they would be stressed. They are still shaking their heads. Tonight I have noticed that there is a little popping or crackling sound when the chicks breathe. I don't know what is causing it... please, I need some advice immediatly. I do not wish to get rid of them nor buy others either.