I haven't seen this show since the early 90s, and now I'm watching on Prime. I had totally forgotten that Lisa's Yorkie appeared in the actual episodes. I only remembered the dog from the opening. Does the dog disappear at some point?
Yeah he eventually disappeared. He was in a handful of season 1 episodes and a few isolated appearances in 2 and 3. They never gave an explanation. In a later season Oliver says they do not have a dog.
I've always assumed that Oliver just got tired of Lisa's hotcakes and well you know...when you're hungry, LOL JK. Maybe she off with the Petticoat Junction Dog (who's name was "Dog").
What happened to Lisa's dog?
