I'm pretty sure it showed the owners getting hit by a car as soon as they left Whitey behind, which is why she kept blaming herself and saying "it's my fault since I let go." The text reads something similar to crash/clatter and you can see the red brake lights as Whitey runs towards them.
THE OWNER'S CHILD DIES TOO??????? WHAT THE FUCKABSJSKSLM ???????
IF IT'S THE OWNERS I'M LIKE NOT THAT SAD BUT THE INNOCENT CHILD?? THEN WHAT'S THE POINT OF ABANDONING WHITEY YOU BASTARDS