My cat who is usually very skittish has been hanging around me a lot and has been craving attention, she never does this, she usually runs away if you even go to approach her to fill her food bowl. I have also noticed that she doesn't seem to be gaining weight. Her and her sister each had a litter of 3 kittens in around the start of June, they were normal weight after giving birth and we have been feeding them extra so they will gain weight, but they don't seem to be gaining weight and they are quite thin. I am very worried that there might be something going on, can anyone help me out?

They started to lose weight after their kittens had been rehomed

It's time to get these poor ladies spayed.