Shadowcat Hide

Shadowcat Hide is a drop that is no longer attainable. It used to drop when skinning panthers.

Source
Shadowcat Hide previously could be skinned from Shadow, Shadowmaw, and Elder Shadowmaw Panthers in Stranglethorn Vale and Swamp of Sorrows.

Leatherworking
This item was previously used to craft these Leatherworking recipes, prior to Patch 3.1.0: