11 year old Female cat

Question
Over the past weeks my cats belly got huge and hard, last night around her bum was all wet so we wiped it and it was a brown liquid, then we sat with her for awhile and noticed when she walked  it was a thick white dripping from her ?

Answer
Hi Manda.  This sounds like an extreme emergency situation if your cat is not spayed.  And I mean that she may die if she does not receive vet care tonight.  If your kitty isn't spayed, please get her to a veterinarian right now, even if it means going to an emergency facility!

Unspayed cats can get an infection of the uterus called pyometra.  There is open pyometra, where pus can drain out of the uterus, and closed pyometra, where the cervix has closed, and the infection has no way to drain out.  Both are deadly, but closed pyometra is dangerous more quickly because the uterus can burst.  When an unspayed cat's belly begins getting huge, and she is not confirmed pregnant, it can indicate that her uterus is closed and is filling with pus.  Many cats die from this, and I even lost one of my Siamese despite knowing exactly the signs to look for, since there are often no signs until it's too late.  

That brown liquid is likely badly infected pus, possibly with blood, and the white liquid is pus as well.  The fact that now there seems to be pus draining could be a sign that the uterus has opened up.  Hopefully, that will prevent her uterus from bursting.  It does not put her at much less risk for complications, however.  Pyometra can lead to bacteria that spread quickly outside the uterus.  The cats die of kidney failure, liver failure or septicema - an infection of the blood.  It is extremely difficult to save a cat with septicemia.

The best treatment for a cat with any type of pyometra is an emergency spay.  The vet will take her immediately and put her under anesthesia to remove her uterus as well as the ovaries.  As long as septicemia has not set in, almost all cats make a 100% recovery.

Some SPAYED cats will also get pyometra of the tiny bit of tissue that is left after a spay.  This is called "stump" pyometra.  While it's quite uncommon, I think your description of her symptoms is so consistent with a pyometra that it is very likely pyometra of the uterus, or the uterine stump if she's spayed.

There is the possibility she has an abscess somewhere in her hind quarters that's leaking - check for hidden puncture wounds on her rump that may be producing the pus.  But if you know she's leaking it vaginally, she absolutely has pyometra or a bad vaginal infection.  In any case, pyometra, vaginal infection or abscess, she needs to see the vet for care right away.

I hope all goes well!

Jessica