Breathing heavy normal?

My bearded dragon sometimes breathes heavy when he’s sleeping and it usually stops within a minute I don’t know if this is normal He’s doesn’t have his mouth open gasping for air and he doesn’t wake up when he does breathe heavy I don’t know if this is cause I have him covered with my blanket he seems to be eating fine but he just turned a year old and his pooping is starting to be irregular and he won’t eat his veggies on the last day before he poops (I don’t have a video of him breathing heavy)