The episode Dexter's Lab: A Story would later replace the Dial M for Monkey episode "Barbequor" during reruns, the DVD release of season 1 and on digital streaming services such as HBO Max due to the controversy surrounding the episode.
Although this episodes originally aired in 1998, there were made in 1997 according to the credits. Later episodes were reran and copyrighted in 1998 to also produced that year after the Dial M for Monkey episode "Barbequor" removed and replaced with it along with sister episodes "Double Trouble" and "Changes" (a rerun from the original Cartoon Cartoon Show) from the original first season's fourth episode.
Dad is a dog lover, so he didn't care if Dexter wanted the dog or not; which is why he walks off right after Dexter he doesn't feel like he can handle such a responsibility.