They are running a bunch of tests. Where I thought or hoped that this could turn out to be not as huge as I thought, the Dr. said that a tumor on the foot could result from cancer in other major parts of the body, like the lungs or other organs. The tests, I believe are part of what they term as "staging" the cancer. Then they know what they are dealing with so they can decide what is the best treatment.
My poor baby, they told me not to feed her since midnight, I bet she is starving right now. But I have a bag of treats in my purse for when I go and pick her up in a few hours.