Fix most of the pet animals plural -> singular

Improve consistency with animal names. Use singular form with pets just like the other categories do.

chance.js

@@ -7154,7 +7154,7 @@
           //list of farm animals comes from https://www.buzzle.com/articles/farm-animals-list.html
           "farm" : ["Alpaca","Buffalo","Banteng","Cow","Cat","Chicken","Carp","Camel","Donkey","Dog","Duck","Emu","Goat","Gayal","Guinea","Goose","Horse","Honey","Llama","Pig","Pigeon","Rhea","Rabbit","Sheep","Silkworm","Turkey","Yak","Zebu"],
           //list of pet animals comes from https://www.dogbreedinfo.com/pets/pet.htm
-          "pet" : ["Bearded Dragon","Birds","Burro","Cats","Chameleons","Chickens","Chinchillas","Chinese Water Dragon","Cows","Dogs","Donkey","Ducks","Ferrets","Fish","Geckos","Geese","Gerbils","Goats","Guinea Fowl","Guinea Pigs","Hamsters","Hedgehogs","Horses","Iguanas","Llamas","Lizards","Mice","Mule","Peafowl","Pigs and Hogs","Pigeons","Ponies","Pot Bellied Pig","Rabbits","Rats","Sheep","Skinks","Snakes","Stick Insects","Sugar Gliders","Tarantula","Turkeys","Turtles"],
+          "pet" : ["Bearded Dragon","Bird","Burro","Cat","Chameleon","Chicken","Chinchilla","Chinese Water Dragon","Cow","Dog","Donkey","Duck","Ferret","Fish","Gecko","Goose","Gerbil","Goat","Guinea Fowl","Guinea Pig","Hamster","Hedgehog","Horse","Iguana","Llama","Lizard","Mouse","Mule","Peafowl","Pig","Hog","Pigeon","Pony","Pot Bellied Pig","Rabbit","Rat","Sheep","Skink","Snake","Stick Insect","Sugar Glider","Tarantula","Turkey","Turtle"],
           //list of zoo animals comes from https://bronxzoo.com/animals
           "zoo" : ["Aardvark","African Wild Dog","Aldabra Tortoise","American Alligator","American Bison","Amur Tiger","Anaconda","Andean Condor","Asian Elephant","Baby Doll Sheep","Bald Eagle","Barred Owl","Blue Iguana","Boer Goat","California Sea Lion","Caribbean Flamingo","Chinchilla","Collared Lemur","Coquerel's Sifaka","Cuban Amazon Parrot","Ebony Langur","Fennec Fox","Fossa","Gelada","Giant Anteater","Giraffe","Gorilla","Grizzly Bear","Henkel's Leaf-tailed Gecko","Indian Gharial","Indian Rhinoceros","King Cobra","King Vulture","Komodo Dragon","Linne's Two-toed Sloth","Lion","Little Penguin","Madagascar Tree Boa","Magellanic Penguin","Malayan Tapir","Malayan Tiger","Matschies Tree Kangaroo","Mini Donkey","Monarch Butterfly","Nile crocodile","North American Porcupine","Nubian Ibex","Okapi","Poison Dart Frog","Polar Bear","Pygmy Marmoset","Radiated Tortoise","Red Panda","Red Ruffed Lemur","Ring-tailed Lemur","Ring-tailed Mongoose","Rock Hyrax","Small Clawed Asian Otter","Snow Leopard","Snowy Owl","Southern White-faced Owl","Southern White Rhinocerous","Squirrel Monkey","Tufted Puffin","White Cheeked Gibbon","White-throated Bee Eater","Zebra"]
         },