Our old Tortie cat was 15 years old when she died of a heart-attack in front of me.
Skittles (rat) was around 2 years old when she died in my arms.
Oreo (rat) was around 2 years old when we had to put her to sleep because of her tumor.
Punkin (rat) was one year old when she had to be put to sleep due to heart failure.
Klein Hans (Guniea Pig) died when he was 4 years old, of old age.

The Arabian horse that I took English lessons on for 5 years just passed away a while ago. Pretty bummed about that.