Censorship in "Lady & The Tramp"

I have purchased a video copy of Disney’s “Lady & The Tramp”. Near the end of the movie (When the Scottie dog and the Bloodhound are chasing through the streets to catch the dog catcher that has Tramp) Scottie tells the Bloodhound that his sense of smell is gone. The bloodhound replies (at least his mouth moves) but there is no audio. Has something been taken out or is this a mistake on my copy?


My fate keeps getting in the way of my destiny.