Thanks! I'm feeling a bit better today. Madam is only sporadically moaning as opposed to yesterday when it seemed to be on a constant loop! The other three cats seem such low maintenance compared to her - even my diabetic!
I do shout out of frustration more than anything else, because whatever I do she still cries and I don't know if it's because she's unhappy or just a bit confused!
I have a very vocal Bengal, which I have to keep indoors. Some evenings it is non-stop yowling. He yowls when he wants food, yowls when he wants attention, and yowls in the evening when he wants to go out.
It does drive you mad sometimes, and unfortunately my dilemma is that if I do let him out, there are dangerous roads nearby, plus all kinds of perils for a cat, particularly a Bengal. But he is an intelligent cat, and gets bored indoors. I think that one day I will have to let him out and take his chances, but I will keep him in as long as I can.
But in his case he always yowls for a reason, even if it's not always clear what that reason is. It is probable your cat is also crying for a specific reason. It could be that she is not really 'with it', although in my experience cats don't have the same mental issues we do as we age. Have you had her checked over thoroughly at the vet's? Toothache is a possibility. If she is intelligent, she might be getting bored too. There are all kinds of reasons why a cat might cry, and not all of them are obvious.
You have probably checked all these things anyway, but I am just trying to think of anything that might help. Best of luck, anyway, and I wish you some peaceful days.