In Old Yeller what is Jumper?

Jumper is a small, quick, and agile dog in the novel "Old Yeller". He is a yellow dog, likely a mix of breeds and is described as being "smaller than Old Yeller, but just as fast."

Jumper is a playful and loyal companion to Travis, the young boy who narrates the story. He's often seen playing fetch with Travis and protecting him from danger. He's also a good hunter, helping Travis bring down small game.

While not as central to the story as Old Yeller, Jumper is a vital part of the family and a symbol of loyalty and companionship. He provides companionship and amusement to Travis, particularly in the absence of his older brother Arliss who is off working.