Seymour from Futurama. He was Fry's dog in one of those heartwarming flashback to the 20th century episodes. Long story short
SpoilerThe dog was fossilized and was going to be cloned. Then it was found out he died of old age and Fry decided to let him stay dead to be happy with his long doggy life.
Then there was the flashback to sad music. Since 'losing your dog' is on the acceptable list of things to be sad about:
man tear.