Help! One of my 4 chicks seems to be in distress. They are all 3 weeks old and have been in a rabbit cage together the entire time I’ve had them. It sticks its neck up and opens its beak like it is gasping. It doesn’t make noise when it does it and wasn’t doing this yesterday. I change bedding, and water daily. Does anyone know what could be wrong with it? None of the other chicks are doing this.