Back in February, I adopted 2 female kittens from a shelter, both 5-6 months. This is on top of the 14 year old I already have living with me. It's been a little bit over a month now and I've noticed one of the kitties *never* meows or thrills or squeaks like the other one does. I cannot recall a single meow. I can however hear her purr and growl (over the possession of a toy), so she's not a 100% silent. It's still odd. Instead of meowing for things, she'll do this begging gesture with her front paws (it's hella cute). I checked to see if she could hear fine, and it appears to be the case. Is she simply not vocalizing by choice or could there be more to it?