Oh no….I am so so sorry. This must be heartbreaking for you.
I honestly don’t think there is anything you can give him to get rid of this fluid. This, as I’m sure you know, happens with cancer.
The only way to get rid of it is to have it drained by the Vet. It won’t go any other way.But I think it will just build up again within a short time.
Again my heart goes out to you.
****Also all vets are closed until Monday. I called everywhere, so in the meantime I’d appreaciate any advice
Go to your vet it sounds like an obstruction and it could be dangerous. With no urination your dog could possibly be developing kidney issues as well. Cysts can develops in the liver and kidneys causing blockage. Those are my thoughts
You have to take her to an Emergency Vet now!!!!
If she can’t urinate her bladder will have ruptured by Monday, and thats fatal…..this is urgent you cannot leave it that long.
Animal vets can be called in this is an emergent. Find an animal hospital if possible