You better believe it, Tod. Yes, sirree!
6 seconds sound clip from the The Fox and the Hound (1981) movie soundboard.
You can hear this line at 00:31:42 in the Blu-ray version of the movie.
Quote context
[...]
- Why, old Copper, he's my best friend.
- Now, Copper's gonna do what he's been told.
- You better believe it, Tod. Yes, sirree!
- You mean Copper is gonna be my enemy?
- Hey! Kid, you better step over here and take a good look.
- Why... Why, that's awful. Those poor things.
[...]