It's a long and oft-quoted story, so I'll try to keep it brief - Doug voiced Abe all through filming, but knew that the plan was to dub over his voice right from the beginning - he asked to put his name in the hat, along with actors such as Steve Buscemi, Kevin Spacey, and the studio (and GdT) chocie, David Hyde Pierce. Doug and David were the final choices, and Doug did a fantastic job during the looping sessions, but they ultimately went with dear David because he was the better-known actor. Bless his heart, he refused a credit and also refused to do any press for the film. He turned down the animated films, Doug took over, blew everyone away, and the rest, as they say, is history.
HM