^ Kitchener, A. C.; Breitenmoser-Würsten, C.; Eizirik, E.; Gentry, A.; Werdelin, L.; Wilting, A.; Yamaguchi, N.; Abramov, A. V.; Christiansen, P.; Driscoll, C.; Duckworth, J. W.; Johnson, W.; Luo, S.-J.; Meijaard, E.; O’Donoghue, P.; Sanderson, J.; Seymour, K.; Bruford, M.; Groves, C.; Hoffmann, M.; Nowell, K.; Timmons, Z.; Tobe, S. (2017). "A revised taxonomy of the Felidae: The final report of the Cat Classification Task Force of the IUCN Cat Specialist Group" (PDF). Cat News. Special Issue 11: 21. Archived (PDF) from the original on 30 July 2018. Retrieved 21 December 2018.
Kittens develop very quickly from about two weeks of age until their seventh week. Their coordination and strength improves. They play-fight with their litter-mates and begin to explore the world outside the nest or den. They learn to wash themselves and others as well as play hunting and stalking games, showing their inborn ability as predators. These innate skills are developed by the kittens' mother or other adult cats, who bring live prey to the nest. Later, the adult cats demonstrate hunting techniques for the kittens to emulate.[11] As they reach three to four weeks old, the kittens are gradually weaned and begin to eat solid food, with weaning usually complete by six to eight weeks.[12] Kittens generally begin to lose their baby teeth around three months of age, and have a complete set of adult teeth by nine months.[13] Kittens live primarily on solid food after weaning, but usually continue to suckle from time to time until separated from their mothers. Some mother cats will scatter their kittens as early as three months of age, while others continue to look after them until they approach sexual maturity.[14]
Most of the lyrics in Cats were taken from Old Possum's Book of Practical Cats with very minor alterations. Supplementary verses from unpublished poems by Eliot were adapted for "Grizabella: The Glamour Cat" and "Journey to the Heaviside Layer", while the song "The Moments of Happiness" was taken from a passage in Eliot's The Dry Salvages. Cats director Trevor Nunn and lyricist Richard Stilgoe provided the remaining lyrics, namely for the opening number "Jellicle Songs for Jellicle Cats" and the most famous song from the musical "Memory". The former was written by Nunn and Stilgoe and was modelled after an unpublished poem by Eliot titled "Pollicle Dogs and Jellicle Cats", while the latter was written by Nunn based on another Eliot poem titled "Rhapsody on a Windy Night".[1]

Cats, like dogs, are digitigrades. They walk directly on their toes, with the bones of their feet making up the lower part of the visible leg.[69] Cats are capable of walking very precisely because, like all felines, they directly register; that is, they place each hind paw (almost) directly in the print of the corresponding fore paw, minimizing noise and visible tracks. This also provides sure footing for their hind paws when they navigate rough terrain. Unlike most mammals, when cats walk, they use a "pacing" gait; that is, they move the two legs on one side of the body before the legs on the other side. This trait is shared with camels and giraffes. As a walk speeds up into a trot, a cat's gait changes to be a "diagonal" gait, similar to that of most other mammals (and many other land animals, such as lizards): the diagonally opposite hind and fore legs move simultaneously.[70]

Though it’s not something you have any control over, your kitten’s age is more than just a number. In fact, it’s crucial that you learn it. Kittens have very specific developmental needs for the first 10 weeks of their lives in terms of nourishment, warmth, socialization, and excretion. For this reason, most breeders and shelters typically wait until their kittens are of age before they’re put up for adoption. If you, by chance, find yourself in a situation where you need to care for an orphaned kitten under 10 weeks old, consult your vet for special instructions.

A combination of required nutrients is used to satisfy the overall growth and development of the kitten body, there are many ingredients that kittens do not require, but are included in diet formulation to encourage healthy growth and development. These ingredients include: dried egg as source of high quality protein and fatty acids, flaxseed as source of flaxseed oil which is rich in omega 3 fatty acid and aids in digestion, calcium carbonate as a source of calcium, and calcium pantothenate (vitamin B5) acts as a coenzyme in the conversion of amino acids and is important for healthy skin.[42]

^ Jump up to: a b Loss, Scott R.; Will, Tom; Marra, Peter P. (29 January 2013). "The impact of free-ranging domestic cats on wildlife of the United States". Nature Communications. 4. Article number 1396. Bibcode:2013NatCo...4.1396L. doi:10.1038/ncomms2380. PMID 23360987. We estimate that free-ranging domestic cats kill 1.4–3.7 billion birds and 6.9–20.7 billion mammals annually.
Taurine is an essential amino acid found only in animal tissues and cannot be produced in sufficient amounts by the cat.[36] As it is an indispensable amino acid, it must be provided exogenously through the diet at 10 mg/kg bodyweight/day.[37] Kittens deprived of taurine can experience poor growth[36] and can result in retinal degeneration in cats.[38]
The 2014 London revival introduced several modernizations to the show. Rum Tum Tugger was reworked and changed from a ladies-man rockstar to a breakdancing street cat. His eponymous musical number was also turned into a rap.[389][390] The 2015 Australian tour and 2015 Paris production also used the new version of the character; however, the 2016 Broadway revival did not.

Since kitten diets are very high in calories, ingredients must be implemented to ensure adequate digestion and utilization of these calories. Choline chloride is an ingredient that maintains fat metabolism.[42] Biotin and niacin are also active in the metabolism of fats, carbs and protein.[42] Riboflavin is also necessary for the digestion of fats and carbohydrates.[42] These are the main metabolism aids incorporated into kitten diets to ensure nutrient usage is maximized.
^ Glen, A. S.; Dickman, C. R. (2005). "Complex interactions among mammalian carnivores in Australia, and their implications for wildlife management" (PDF). Biological Reviews of the Cambridge Philosophical Society. 80 (3): 387–401. CiteSeerX doi:10.1017/S1464793105006718. PMID 16094805. Archived (PDF) from the original on 22 September 2017.
^ Jump up to: a b Lipinski, Monika J.; Froenicke, Lutz; Baysac, Kathleen C.; Billings, Nicholas C.; Leutenegger, Christian M.; Levy, Alon M.; Longeri, Maria; Niini, Tirri; Ozpinar, Haydar (2008). "The Ascent of Cat Breeds: Genetic Evaluations of Breeds and Worldwide Random-bred Populations". Genomics. 91 (1): 12–21. doi:10.1016/j.ygeno.2007.10.009. PMC 2267438. PMID 18060738.
The Dutch live entertainment company Stage Entertainment has been responsible for several European productions of Cats. The company produced the musical at the Coliseum Theatre in Madrid from December 2003 to January 2005, with a cast that included Víctor Ullate as Mistoffelees.[210][211] They then staged a Russian-language production at the Moscow Palace of Youth from 2005 to 2006, with a cast that included Ivan Ozhogin as Munkustrap.[212][213] A Dutch production under the same company toured the Netherlands and Belgium from 2006 to 2007,[205][214] featuring several performers in the role of Grizabella including Pia Douwes and Anita Meyer.[215][216] A Paris revival by Stage Entertainment ran at the Théâtre Mogador from October 2015 to July 2016. This production was based on the 2014 London revival and also featured a new song written especially for the French show by Lloyd Webber.[217][218]
Feral cats can live in forests, grasslands, tundra, coastal areas, agricultural land, scrublands, urban areas, and wetlands.[204] Their habitats include small islands with no human inhabitants.[205] The close relatives of the domestic cat, the African wildcat (Felis lybica) and the sand cat (F. margarita) both inhabit desert environments.[42] Domestic cats still show similar adaptations and behaviors.[103]

The gestation period of queens is between 64 and 67 days, with an average of 66 days.[183] Data on reproductive capacity of more than 2,300 free-ranging queens were collected during a study between May 1998 and October 2000. They had one to six kittens per litter, with an average of three kittens. They produced a mean of 1.4 litters per year, but a maximum of three litters in a year. Of 169 kittens, 127 died before they were six months old due to a trauma caused in most cases by dog attacks and road accidents.[9] The first litter is usually smaller than subsequent litters. Kittens are weaned between six and seven weeks of age. Queens normally reach sexual maturity at 5–10 months, and males at 5–7 months. This varies depending on breed.[178]
The musical has also been translated and staged nationally in Asia. From September 2008 to January 2009, a Korean-language production performed at the Charlotte Theatre in Seoul, with Shin Youngsook and Ock Joo-hyun alternating as Grizabella, Kim Jin-woo and Daesung alternating as Rum Tum Tugger, and Kim Bo-kyung as Rumpleteazer.[268] This production was revived and toured South Korea from 2011 to 2012, with Insooni and Park Hae-mi taking turns to portray Grizabella.[269] The first Mandarin-language production toured various cities in China in 2012.[270]
The cat (Felis catus) is a small carnivorous mammal.[1][2] It is the only domesticated species in the family Felidae and often referred to as the domestic cat to distinguish it from wild members of the family.[4] The cat is either a house cat or a farm cat, which are pets, or a feral cat, which ranges freely and avoids human contact.[5] A house cat is valued by humans for companionship and for its ability to hunt rodents. About 60 cat breeds are recognized by various cat registries.[6]