Does your baby make growling noises?

Kayley • 24 years old, I have a little boy who’s 4 and I’m TTC my second baby!! 👶🏻
My son is 4 months old and for the last few days he's been growling/hissing all the time, like all the time. Is this normal? Does your baby make strange growling noises?😂😳 

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