[1] When Fry takes Bender to a museum exhibit, he is shocked to find a fossilized dog on display, which he recognizes as his pet from the 20th century, Seymour Asses.
For three days he protests in front of the museum by dancing to "The Hustle" by Van McCoy, demanding they give him Seymour's body, which proves successful.
The Professor begins the cloning process, and his computer informs him that Seymour died at the age of 15, meaning he lived twelve years after Fry was frozen.
Fry has a change of heart and aborts the cloning process, believing that Seymour must have moved on with his life, found a new owner, and forgotten about him.
[2] According to the DVD commentary, the last part of the episode where Seymour is waiting outside on the sidewalk was originally set to "Gayane's Adagio" from Aram Khachaturian's Gayane ballet suite, famously used in the sequence introducing the Discovery spacecraft in 2001: A Space Odyssey, but was replaced with the song "I Will Wait for You" from The Umbrellas of Cherbourg as sung by Connie Francis, which writer Eric Kaplan's grandparents sang and played on the piano while he was a child.
Executive producer David X. Cohen states in the commentary for "The Why of Fry" that these shots were included in order to foreshadow the events of that episode.
[3] Bender's Big Score, produced five years after "Jurassic Bark", revisits Seymour, and puts the closing scene of the episode in a much happier context.
7 in their list of the top 25 Futurama episodes, with critic Dan Iverson remarking that the climax was "one of the saddest endings to a television program that I have ever seen".