Hi There,
Start by getting three cat carriers big enough for each of them to live in comfortably with a litterbox. Try to get some of their own urine and feces to put in each box so they know that is what the box is for. Also, this way you may be able to train, say 2 of the 3 and make only one an outdoor cat. It may take several days, so be patient.
Also, mouse traps placed under tin foil will discourage cats from going onto things where you don't want them to be. The noise will scare them.
Good Luck,
Dr. Katie
Edited by Dr. Katie on November 16 2004 at 9:32 PM