New adopted shy cat meets 2 older cats?

 
New adopted shy cat meets 2 older cats?
I work at a vet and we are more so an animal hospital then a shelter but when people find kittens or friendly stray cats we offer to help find homes for them. Well one of our clients brought in a very shy but very friendly 6 month old calico kitten. She was spayed and updated on all her shots done by my boss. Then all she needed was a home. Unfortunately my b*tch of a co worker kept telling people who were interested that the cat was skittish. She was shy big difference. So she was having trouble getting adopted. 2 months went by before I decided to take her. I only didnt want her right away cause my cats are 17 and 15yrs old. Who is going to play with her...so anyway I brought her home today and of course the 2 I have are hissing at her. Well I gave her a separate food and water bowl and she did have some from both but even after I showed her the litter box twice she still hasnt used it. My cats tend to pee over board so I dont have a normal cat box instead its a 35 gallon rubber maid container. I have there cat tree next to it for like a step stool to get in. pets question and answers,www.5d2d.com
Well this cat is so shy and afriad from the other 2 cats that I dont know how to get her to understand thats how she gets in.? Or should I go by a normal cat box till she gets used to the drill.??
I did show her the box by placing her inside but she still hasnt used it and I brought her home 5 hrs ago. She did go to the bathroom before I packed her up to leave though.
you have NOT introduced them correctly - that is a large part of the problem

here is a guide on how to introduce a new cat
http://therealowner.com/cats/introducing…

you should have 1 litter box per cat!
O yes it is very odd to me b/c i just went through the same exact thing you see we brought home a cute shy kitten named Jet.And our 2 older cats Jiggy and Jazzy were not all that thrilled,but they got use to him :) So what I am saying is give it time they will get use to each other I promise. GOOD LUCK!!! :)
Cheers for your kind heart in adopting this poor kitty. And hisses to your disgusting co-worker for her lousy "helpful" information to potential adopters. Your little girl is probably somewhat shell-shocked now, as this is the third home (at least!) she has had to get used to in her short life. It seems the gurus think there should be at least one kitty box per cat, plus one extra -- don't know if this would be helpful or not, but if you can have patience for a while, it probably will. If your little girl was shy to start with, it is going to be tough for her. Meantime, it might help to take a look at DearTabbyTheAnswerCat.com. They have an excellent article in "Cat Care" on "How to Introduce the New Kitten/Cat to Your Cat." Hope this all helps.