Lady and the Tramp (1955)

Continuity mistake: When Jock and Trusty are telling Lady that Darling is having a baby, Lady's collar changes from blue to brown and back to blue when Tramp comes close to her.

Kimberly Klaus

Lady: ...But when she put that horrible muzzle on me.
Tramp: Say no more, I get the whole picture. Aunts, cats, muzzles... Well, that what comes of tying yourself down to one family.
Lady: Haven't you a family?
Tramp: One for every day of the week. The point is, none of them have me.

Trivia: One of the filmmakers suggested introducing a newborn baby in the story because he had just had a baby, and thought it was interesting to watch his own dog react to a new baby in the house.