I am going absolutely crazy right now with not knowing on what to do.

Currently staying at my mums house with my partner and two young babies. I'm here to look after my mums two kittens.

They are ragdolls and my mum has two of them, they are sisters.

They are a bit weird as in they aren't majorly affectionate and are barely eating anything!!! They just lick the gravy or jelly and that's it.

Well one of the kittens Mia, she is meowing all the time. Sticking her butt in the air and it's weird. It's like she's looking for a mate?

Is this normal? They haven't started their periods just yet. Also we've gone through most cat/kitten foods and they don't like it!!

What can I do??