Patiently chew some grass. On the next round, you will deal 492 Critter damage in addition to your next attack.
Chew can deal damage from the back row.
Pet Battle: [1-2] Elwynn Forest
Pet Battle: [23-25] Valley of the Four Winds; [23-25] The Jade Forest
Vendor: Corporal Arthur Flew
Cost: 40 (unlimited supply)
Drop: Gu'chi the Swarmbringer 
Zone: Timeless Isle
Approximate Drop Rate: 1 in 33
Approximate Drop Rate: Unknown
Pet Battle: [3-6] Loch Modan
Drop: Glass of Warm Milk
Zone: Lunarfall, Frostwall
Drop Rate: 1 in 1
Pet Battle: [23-25] Kun-Lai Summit