Pets are special Tappables in the game, which will reward you with 
XP, 
Energy, 
Cash and 
Stars, when you tap them. Pets can be purchased for certain homes within the game and you cannot transfer them between homes. You can tap a pet for a reward every 4 hours; rewards may vary.
All Pets, including their locations, rewards, and if they are available to be taken for walks, are listed in alphabetical order below.
Pets
Aegean Cat
Cost: 45
Purchase Reward: 
5
Location: Mykonos Home, Mykonos
Walk Pet:
Tap Reward: 2, 25, 11
Alpaca
Cost: 80
Purchase Reward: 5
Location: Maipo Valley Home, Maipo Valley
Walk Pet:
Tap Reward: 2, 39, 10
Chameleon
Cost: 55
Purchase Reward: 
11
Location: Santa Barbara Home, Santa Barbara
Walk Pet:
Tap Reward: 2, 40, 18
Charli
Cost: 20
Purchase Reward: 10
Location: duLUXE Lifestyle Apartments, Downtown LA
Walk Pet: Yes
Tap Reward: 2, 15, 10
Cockatoo
Cost: 60
Purchase Reward: 5
Location: New Orleans Home, New Orleans
Walk Pet:
Tap Reward: 2, 39, 16
Cocker Spaniel
Cost: 45
Purchase Reward: 3
Location: San Diego Home, San Diego
Walk Pet:
Tap Reward: 2, 59, 10
Corgi
Cost: 30
Purchase Reward: 3
Location: Hamptons Beach Home, The Hamptons
Walk Pet:
Tap Reward: 2, 60, 18
English Bulldog
Cost: 50
Purchase Reward: 20
Location: London Flat, London
Walk Pet:
Tap Reward: 2, 28, 10
Exotic Aquarium
Cost: 25
Purchase Reward: 5
Location: Havana Mansion, Havana
Walk Pet:
Tap Reward: 2, 40, 8
Exotic Reindeer
Cost: 80
Purchase Reward: 2
Location: Vail Home, Vail
Walk Pet:
Tap Reward: 2, 55, 7
Exotic Short-Hair Cat
Cost: 50
Purchase Reward: 10
Location: Boardwalk Condos, New Jersey
Walk Pet:
Tap Reward: 2, 56, 10
French Bulldog
Cost: 50
Purchase Reward: 6
Location: Apartamenti Milano, Milan
Walk Pet:
Tap Reward: 2, 35, 15
Ghost Butler
Cost: 90
Purchase Reward: None.
Location: Prague Home, Prague
Walk Pet: No
Tap Reward: +2, +66, 10
Giraffe
Cost: 80
Purchase Reward: 5
Location: Abu Dhabi Home, Abu Dhabi
Walk Pet:
Tap Reward: 2, 61, 6
Goldfish
Cost: 50
Purchase Reward: None
Location: duLUXE Lifestyle Apartments, Downtown LA
Walk Pet: No
Tap Reward: 2
Hippopotamus
Cost: 80
Purchase Reward: 8
Location: Cape Town Home, Cape Town
Walk Pet:
Tap Reward: 2, 50, 15
Irish Terrier
Cost: 65
Purchase Reward: 3
Location: Dublin Home, Dublin
Walk Pet:
Tap Reward: 2, 47, 20
Italian Greyhound
Cost: 40
Purchase Reward: 16
Location: Malibu Home, Malibu
Walk Pet:
Tap Reward: 2 67, 10
Lagotto Romagnolo
Cost: 50
Purchase Reward: 5
Location: Rome Home, Rome
Walk Pet:
Tap Reward: 2, 20, 7
Lion
Cost: 50
Purchase Reward: 20
Location: The Atlantean Hotel Suite, Dubai
Walk Pet:
Tap Reward: 2, 58, 9
Miniature Horse
Cost: 50
Purchase Reward: 5
Location: Vienna Home, Vienna
Walk Pet:
Tap Reward: 2, 39, 16
Miniature Pincher
Cost: 15,000
Purchase Reward: 40
Location: Miami Beach Home, Miami
Walk Pet:
Tap Reward: 1, 35, 19
Peacock
Cost: 150
Purchase Reward: 3
Location: Papagayo Hotel, Papagayo
Walk Pet:
Tap Reward: 2, 68, 10
Persian Cat
Cost: 60
Purchase Reward: 8
Location: Monaco Home, Monaco
Walk Pet:
Tap Reward: 2, 50, 10
Pitbull
Cost: 45
Purchase Reward: 5
Location: St. Barts Home, St. Barts
Walk Pet:
Tap Reward: 2, 41, 9
Poodle
Cost: 65
Purchase Reward: 8
Location: Brooklyn Home, Brooklyn
Walk Pet:
Tap Reward: +2, +46, +8
Potbellied Pig
Cost: 60
Purchase Reward: 10
Location: San Francisco Brownstone, San Francisco
Walk Pet:
Tap Reward: 2, 21, 20
Polar Bear Cub
Cost: 80
Purchase Reward: 5
Location: Igloo Club, Reykjavík
Walk Pet:
Tap Reward: 2, 9
Pomeranian
Cost: 40
Purchase Reward: 8
Location: Calabasas Mansion, Calabasas
Walk Pet:
Tap Reward: 2, 39, 12
Pomeranians
Cost: 60
Purchase Reward: 8
Location: Lisbon Home, Lisbon
Walk Pet: No
Tap Reward: +2, +30, +6
Sheep Dog
Cost: 50
Purchase Reward: 5
Location: Montana Lodge, Montana
Walk Pet:
Tap Reward: 2, 26, 16
Squirrel
Cost: 70
Purchase Reward: 2
Location: Yorkville Luxury Suite, Toronto
Walk Pet:
Tap Reward: 2, 35, 12
Weimaraner
Cost: 75
Purchase Reward: 30
Location: Hôtel Utopie, Paris
Walk Pet:
Tap Reward: 2, 44, 5
Yorkie
Cost: 50
Purchase Reward: 20
Location: Florence Villa, Florence
Walk Pet:
Tap Reward: 2, 27, 17
Yorkshire Terrier
Cost: 60
Purchase Reward: 5
Location: Cannes Home, Cannes
Walk Pet:
Tap Reward: 2, 70, 14