Hi Ginab,
Has a animal healer practitioner and a cat breeder, if it was my cat i would,if there was no way he would have the pills without alot of upset, and he wasn`t in pain, at his age just let him live the rest of his time in peace with you, giving him lots of love. (but only you know what`s best for his condition). I also had a cat with cancer at 11 years old, the vet said if she had a operation there was no guarantee that the cancer would not come back, so i was not going to let her go through a big operation with no guarantee of complete cure, i had her another year before she passed away in my arms. All she needed was my love and prayers, ( i`am not religious but prayers do help ).
Regards Amanda.