I bought 4 silver campine chicks from a show on Sat. they are from about one week to two weeks old. Today one of the smaller ones was laying on it's side so I picked it up and it kept gasping for air. I listened and couldn't hear a lung problem, it was just opening it's mouth with every breath. Within about 20 min. it died in my hands. Concerned I looked over the others and noticed the other younger one was kind of listless and now it is going from having spasms to peeping and acting normal almost like it is having seizures it's head folds back and it falls on it's side for a few minutes and then it gets back up and sits until it happens again. The poop looks normal, the crop is soft and full, no pasty butt and eating and drinking on occasion. I was concerned there was a problem with it reaching it's food. But I made sure it could get to it. I also had my nieces over yesterday, and they kept handling the chicks when no one was looking, I kept catching them in the act. Other than that I am unsure of what could be wrong. I am hoping and praying nothing contagious any ideas!? the other two are a bit larger and older but not much and they are acting fine.