No, Pooh. I never should have left the dog alone. It was my responsibility.
5 seconds sound clip from The New Adventures of Winnie the Pooh - A Pooh Day Afternoon (S4E3).
You can hear this line at 00:16:50.324 in the Blu-ray version of the episode.
Quote context
[...]
- You can stop squeezing the horn now, Piglet.
- Mad dog!
- I can't believe this happened. They trusted me with their dog, and I lost him twice.
- No, Pooh. I never should have left the dog alone. It was my responsibility.
- But you didn't leave him alone, Christopher Robin. You left him with us.
- I better figure out what I'm gonna tell the neighbors.
- Maybe you could break it to him easy. Like, tell him how much they'll save on dog food from now on.
[...]