Hi ladies my son is 9 months old and doesn't really babble. He does this grunting guh sound all day with his mouth closed kind of like you would expect someone to do when they have an itchy throat. He says baba rarely but that's it. He also likes to scream really loud like an opera singer. He gets really amused when I say mamama and dadada repeatedly but he never tries to imitate. Anyone else going through this? Is this ok at this age? His doc app is next week I plan to bring this up. Thanks for any input