Hi. I found a stray or feral cat and am trying to rescue her. She's been to the vet to get all shot and was fixed. She is very afraid and I am allowing her to hide in my extra room until she recooperates. It's slow going. She only allows my to see her for about 30 seconds before she hides. Anyway, its been about 6 days and she has not used the litter box I have in the room. Is there something I can get to put in the litter to draw her out and get her to use it?