I think it's due to that there's only 1 true leather pet class

Druid pets are so very minimal that they don't account for anything. And iirc, ferocity focus is on pants? Beasts just have to rely on non-visible slots for the focus

Now that you mention it though, that mask off Azail always seemed to be a lil rare, even though it was supposedly in her common drop list

Perhaps it's that "If you need it, it wont drop" rule
