Male cat with mammory tumors?

that would depend if it is malignant or not, and if it is malignant- then how far the cancer has spread. if its in his lymph nodes then it is too far gone and better to just make what life he has left comfortable until he is in too much pain and put him to sleep. it could be just fatty tumors, and having them removed would be no problem. if they are cancer and you found them early enough, then he should be fine (unless of course the cancer comes back) chemotherapy is really hard on animals. i personally dont recommend it, if it is cancer. it normally doesnt prolong their life long enough to make it worthwhile. but that is more if it had spread to his lymph nodes. be glad it is the - they are external so easier to masticate than if cancer is inward. good luck hope it helped.