Felines: WoW Battle Pets

Vendor: Sylvia Hartshorn

Zone: Val'sharah

Faction: Dreamweavers - Revered

Cost: 500 (unlimited supply)

Vendor: Mei Chele

Zone: The Wandering Isle (Monk Order Hall)

Cost: 1000 (unlimited supply)

Vendor: Pelefien

Zone: City of Threads

Cost: 2250 (limited supply: 1)

Drop: World Drop

Zone: Hillsbrad Foothills [7-30]

Approximate Drop Rate: 1 in 8,000

Vendor: Donni Anthania

Zone: Elwynn Forest

Cost: 40 (unlimited supply)

Vendor: Breanni

Zone: Dalaran (Northrend)

Cost: 50 (unlimited supply)

Pet Battle: [1-2] Eversong Woods; [1-2] Elwynn Forest; [1-3] Silvermoon City; [7-8] Arathi Highlands; [20-21] Netherstorm

Pet Battle: [3-4] Northern Barrens; [9-10] Southern Barrens

Vendor: Donni Anthania

Zone: Elwynn Forest

Cost: 40 (unlimited supply)

Pet Battle: Tazavesh, the Veiled Market (Dungeon)

World Event: Darkmoon Faire (first week of each month)

Vendor: Lhara

Zone: Darkmoon Island

Cost: 90 (unlimited supply)

Drop: Darkmoon Game Prize

Zone: Darkmoon Island

Approximate Drop Rate: 1 in 1,250

World Event: Hallow's End

Vendor: Woim

Zone: Tirisfal Glades

Cost: 150 (unlimited supply)

Vendor: Pippi

Zone: Stormwind City

Cost: 150 (unlimited supply)

Drop: P.O.S.T. Master [??+]

Zone: Tazavesh, the Veiled Market

Approximate Drop Rate: Unknown

Drop: Jenafur

Zone: Karazhan

Pet Store 

Trading Card Game: Twilight of the Dragons

Vendor: Donni Anthania, Steven Lisbane

Zone: Elwynn Forest

Cost: 40 (unlimited supply)

Quest: Some Good Will Come [35]

Zone: Northern Stranglethorn

Pet Battle: [13-14] Tanaris

Vendor: Z'tenga the Walker

Zone: Tanaan Jungle

Faction: The Saberstalkers - Revered

Cost: 1500 (unlimited supply)

Vendor: Dealer Rashaad

Zone: Netherstorm

Cost: 60 (unlimited supply)

Pet Battle: Tazavesh, the Veiled Market (Dungeon)

Vendor: Donni Anthania

Zone: Elwynn Forest

Cost: 40 (unlimited supply)

Pet Battle: [1-2] Dun Morogh; [3-6] Loch Modan

Quest: Tale of Tails [80]

Zone: Hallowfall

Vendor: Auralia Steelstrike

Zone: Hallowfall

Faction: Hallowfall Arathi (Renown Fifteen)

Cost: 6500

Pet Store 

Quest: Save Tomothy [80]

Zone: Hallowfall

Drop: Alleria's Corrupted Chest

Zone: Horrific Vision of Stormwind

Approximate Drop Rate: Unknown

Vendor: Lil Timmy

Zone: Stormwind City

Cost: 60 (supply of 1)

Vendor: Michelle De Rum

Zone: Winterspring

Cost: 50 (unlimited supply)

Vendor: Master Li

Zone: Timeless Isle

Cost: 3 (unlimited supply)