Which is an example of how Travis loves Old Yeller unconditionally?

Travis loves Old Yeller unconditionally by fiercely protecting him, even when faced with danger. He shows this love when he risks his own safety to save Old Yeller from a wild animal attack, demonstrating his deep bond and commitment. Additionally, despite the challenges they face together, Travis never wavers in his affection for the dog, highlighting the strength of their relationship throughout the story.