Well for comfort I would say that wolf fur would work best, because its long and fluffy. Bear fur is coarse and so is deer. As for hide goat skin is very soft. Bison fur is very warm( just so you know). How will the "sentient quadruped" skin the hide and keep it from rotting? Is he smart enough to use tannic acid (found in plants) or will he try brain tanning (a native American technic for preserving hide)? Making leather takes time and intelligence (the human should probably do it). Maybe the human should just cuddle with the quadruped if it's fury.

......... Who the crap sleeps on pine needles:)

Writing a story in which a large sentient quadruped allows a stranded human to live with him in his cave through the winter. The creature sleeps on a nest of leaves, pine needles, and dry grass. She finds it too itchy, so he goes out and acquires a large fur or several medium-sized furs to cover the nest with for her benefit. I am trying to figure out which animal would be best suited to this purpose. Considered bear, bison, deer/elk, wolf, heck even friggin llamas. The world is earth-like but not specifically earth, so the various options are more biome-specific than region-specific. Assuming warmth is not an issue in this cave and it's purely for comfort, what animal's fur/hide would be best?