The chance for cats to contract cancer is less than the dogs. However, when it gets contracted, the cancer can get more aggressive. To avoid further serious problems, it is wise to know some of the cat cancer symptoms. A cat that had contracted cancer may have a trouble in swallowing food or eating, radiates bad odor, and have stiffness or lameness that persists over a period of time. It could also have too bigger size of lump and when it gets sore the sore does not heal in normal period. It also gave difficulties in urinating or defecating. Sometimes it bleeds without any clear cause and its breathing is troubled.