My Riley Died Suddenly Yesterday

Would not eat breakfast, fine the day before, ate ,took a walk. Too ASAP to our vet,,,they took x-rays and did blood tests..thought the spleen ws causing bleeding. Immediate surgery and home next dy. they opened him and had cancer fully engulfed his liver. Called us for decision; no quality of lif and would die anyway. had him put to sleep and went to the vets to see him and kiss him. heart is broken after 13 1/2 yrs. i can't function..life will never be the same. I am devastated!