Andy's first gift is a present, which is believed to be Buster. Buster is never seen.
Toy Story 2
Buster appears when the toys have an alert that he is coming. He knocks over the toys's creations. Buster is later seen alongside Andy and he usually plays with him.
Toy Story 3
Buster is now a slow dog. Woody tries to use him, but he knows he is old. Buster's ears are different.