Gasping - play or real?

Brooke • Beautifully in over my head. Wife, mama, birth doula 💍8/3/12 💒 💙7/2016 👦🏼 💜11/2018🧜🏻‍♀️
The past couple days my LO has been making a gasping noise. It sounds really scary but he only does it when he's playing, which makes me think he might have just discovered a new noise. We also have dogs so I'm hoping he's not developing an allergy. Just wondering if anyone else's 6 month old does this. 
He was JUST at the doctor Wednesday for his well visit and everything looked healthy.