Gasping? Clucking? not sure....(I'm new to this)

[JoanofArcismychicken]

So my chicks are about 7 weeks old and they I have noticed in the last week or so that they are moving their necks like they are clucking but they still just peep. Am I right to assume that they are doing this because they are to young to cluck right now? I started looking at them wondering if they were gasping for air. They seem fine otherwise, running around eating constantly and pooping solid for the most part. Is this normal? Thanks!