Hi - new to TDK. I wanted to get some advice on my two new female kittens. They are littermates and about 11.5 weeks old. They have completely different personalities. One is very vocal, aggressive, and is constantly in motion. The other is silent (I'm not sure if she's able to meow), very sweet, and is much calmer than her sister.
The more aggressive sister is constantly stalking, pouncing on, and chasing after her more docile sister. Even when they're sleepy, the more aggressive kitten bites her sister on the neck and keeps her mouth on her sister's neck instead of grooming her. I understand that play fighting in kittens is normal and necessary for their development, but I worry about the calmer kitten, especially because she doesn't (or is unable to meow). I know that kittens get signals from their littermates about when enough is enough, but I wonder if the message isn't getting across because the quiet one doesn't make a peep. Also, I wonder if this is my fault because I brought the more aggressive sister home at 10 weeks and her sister at 11 (to keep her company) and if she simply was not properly socialized.
In any event, if any of you have dealt with this situation before, I'd very much appreciate your thoughts on whether this is normal behavior, when I should intervene (I've noticed on occasion that both of them get poofy, pull their ears back, side hop, and then rush back at each other), if it eventually stops, when I should intervene, and if I should consider separating the two. Thanks very much for your advice!