I had four indoor cats, but I just lost one recently due to feline leukemia. I received Romeo from the humane society. He had been checked negative for the disease, but must have just contacted the disease as he got it later. I made a point of immunizing all of my cats against all diseases even though they are indoor cats. It is because they did that the disease did not pass to my other cats and the remaining three are negative.

The only reason that I would not immunize a cat is if it is elderly or in poor health. It is better for your cat to have a one day reaction than to have him develop a fatal disease. Do you remember the story, "The Mask of the Red Death?" They all thought that they were safe, too. But the fact is that you can't build your walls high enough.