For as long as I've had Zeus he's always done this thing where he puffs up his beard. Not in anger. He fills it halfway then releases it and repeats this several times and stops (Imagen a bearded dragon taking puffs from a cigar). However he does this several times a day and I've always wondered why. I've taken him to the vet and they didn't seem worried, so I'm not. I'm just wondering why he does it.