Question: When Charlie brings a pizza to the puppies, and they shout, "Charlie", how do they know what his name is?
Answer: Charlie may have visited the puppies before so they know who he is.
All Dogs Go to Heaven (1989)
1 question
Directed by: Don Bluth, Gary Goldman, Dan Kuenster
Starring: Burt Reynolds, Dom DeLuise, Judith Barsi, Melba Moore
Plot hole: They go and buy Anne Marie a whole new wardrobe. So, how come in the remainder of the movie she continues to wear her old rags?
Flo: She's burning up a fever, Charlie. She could have pneumonia.
Charlie: Think she needs a vet?
Flo: Charlie, she's a little girl. She needs a doctor.
Charlie: Doctor? I don't know any doctors... I'll find one.
Trivia: Judith Barsi was killed by her father a year and half before the film's release. The song "Love Survives" was put in the soundtrack as a dedication to her memory.
Answer: Charlie talks to Anne Marie about them so my guess is that he has visited the puppies and the female dog before maybe even a few times.