My cat broke her leg yesterday and they put it in a cast. She's in a lot of pain and hasn't used the restroom in over twenty four hours. She's eating and drinknig, but it hurts to much to get up and go to the restroom. I bring her and put her into her litter box, but she wont go. It can't be good that she's not using the restroom. What should I do? the vet said to wait it out and she'll get used to the pain and when she's ready, she'll use the restroom. Any other advice?