Dug

"Oh, yes! I will do that right now-- SQUIRREL!!!"

 is a character released with, and is a part of the Up character collection.

About
 is a Golden Retriever specially trained by Charles Muntz alongside his many dogs that assist on the Spirit of Adventure in his caretake and to pursue the "Monster of Paradise Falls". However due to Dug's kind and friendly nature, he is considered a failure among the other dogs and tended to be given missions to keep him away from the others in claims to find Muntz' quarry. One of his searches ends up having the dog encounter Carl Fredricksen and Russell as well as the "Monster" (Kevin) which he politely tries to make his prisoner while instantly allying himself with these strangers, leading to him coming to clash with those he's working for. While typically a nice dog, he has a particular nature which makes him obsessed in noticing and taking down squirrels.