lisa1124 via CatKB.com wrote:
I think you may be right. Her mood swings are crazy. She will sleep like a
baby, then she will get up, go to the litter box, and then bounce out of the
box like a race horse. There has been alot more urine in the litter boxes.
I better get her to the vet. Can you give me more symptoms for diabetes?

I just punched in "diabetes cat" into Google and came up with:

http://www.felinediabetes.com/
And it talked of diabetic cats flooding the litter box, but the site
seems a commerical for one vet.

This following site had immediate solid info:
http://www.vetinfo.com/cdiabetes.html

I think you really need to get a simple glucose test for her. Her mood
swings, her violence, her excessive urination, her obesity from what
you say, this all adds up to diabetes. I guess you'll have to make sure
of the diagnosis first. After the sugar is control, if it's diabetes
which sounds like it so far, that should probably help the violent mood
swings.

I think you're going to have to be tougher with your cat and get her on
a diet to control the possible diabetes. It's not easy, I know. And
food is a way of expressing love, especially to creatures who don't
speak English. But for her life's sake, you'll
both feel better. Start to measure and weigh the food put out.

If I were to ask you, how many calories did you feed your Boo today,
could you tell me? Of course not. But it's not too difficult. I use a
gram scale and measure the food out in grams and then multiple calories
per gram and there I am. I can know pretty closely how many calories
[technically kilocalories but everyone uses calories] my cat is
eating. And also how many I am eating, so we can both suffer together.
I lost 20 pounds. My cat has yet to lose her 2 pounds. But we suffer,
well not really. After the initial day or so, the body reorients itself
and the hunger dissipates.

Again, not to sounds like an idiot, /IF/ this is diabetes, weight
control and food control will help her live. Without weight control, I
think it's going to be awful for the two of you. Ask the vet about
this. With humans there are serious problems with the legs and eyes
and, well, you get the picture.

So I've put my cat on a diet and it's not easy - I had the problem, not
my cat. I think she trusts me but she does swat at me and bite my leg
when I walk by the 'frig and not give her food. Naughty girl.