I decided to clear out every last beast of fable, with the quests, and every legendary and pandaren spirit trainer the other day.  Turned out to be something like 15 bags.  Received the following:

Flawless mechanical Battle Stone (1)

Lesser Pet Treat (3)

Battle Pet Bandage (12)

Magical Mini-Treat (8)

Magical Pet Biscuit (7)

Sack of Expired Pet Food (4)

Well-loved toy (3)

Flawless Dragonkin Battle-stone (1)

Pandaren Air Spirit  (1)

Flawless Undead Battle-stone (1)

Happy Pet Snack (4)

Hair Ball (2)