Colleen Riley is a freelance editor, artist, and immigration paralegal. Her credits include The White Box, Beating the Story, Friendly Local Game Store, Meeples Together, Unknown Armies 3, Infinity, Laser Kittens, More Kittens, Black Mass, and Cavaliers of Mars: Witch-Queen of the Shadowed Citadel. She has also down a lot of work on the Technoir line Technoir, Mechnoir, Morenoir) and the Trinity Continuum (Æon Æxpansion, Distant Worlds, and In Media Res). She serves four (mostly) benevolent feline overlords in Minneapolis, Minnesota. Her Twitter (@wordbunny) and Instagram (colleen_elizabeth_riley) are primarily cat pictures. 
Several natural behaviors and characteristics of wildcats may have preadapted them for domestication as pets. These traits include their small size, social nature, obvious body language, love of play and relatively high intelligence.[57]:12–17 Captive Leopardus cats may also display affectionate behavior toward humans, but have not been domesticated.[54]
Back in the present, after Gus exits, Skimbleshanks is seen sleeping in the corner ("Skimbleshanks: The Railway Cat"). He is the cat who is unofficially in charge of the night train to Glasgow. Skimbleshanks is considered vital to the rail operations, as without him "the train can't start". Within his song, a whole steam train engine is assembled out of objects in the junkyard.
Many of the ensemble characters were created by the original cast through extensive improvisation sessions held during the rehearsal process. Said Nunn: "[O]n day one of rehearsals what we had was 15 poems set to music and five weeks later we had a show with characters, relationships and stories running from beginning to end."[24][25] The production faced a last minute mishap when Dench snapped her Achilles tendon during rehearsals for "The Old Gumbie Cat" and had to pull out one week before the first preview. Her understudy Myra Sands replaced her as Jennyanydots, while Elaine Paige agreed to take over the role of Grizabella. Opening night was pushed back to 11 May, but Mackintosh refused to postpone the previews as he wanted to dispel the industry rumours that the production was an impending debacle.[26]
Before Old Deuteronomy can announce his decision, Grizabella returns to the junkyard and he allows her to address the gathering. Her faded appearance and lonely disposition have little effect on her song ("Memory"). With acceptance and encouragement from Jemima and Victoria, her appeal succeeds and she is chosen to be the one to go to the Heaviside Layer and be reborn into a new Jellicle life ("Journey to the Heaviside Layer"). A tyre rises from the piles of junk, carrying Grizabella and Old Deuteronomy partway toward the sky; Grizabella then completes the journey on her own.[i] Finally, Old Deuteronomy gives his closing speech to the audience ("The Ad-dressing of Cats") and the show comes to a close.
Cats can synthesize niacin, but their breakdown exceeds the rate that it can be synthesized and thus, have a higher need for it, which can be fulfilled through an animal-based diet.[24] Pyridoxine (vitamin B6) is required in increased amounts seeing as it is needed to produce amino acids.[24] To continue, vitamin B12 is an AAFCO-recommended vitamin essential in the metabolism of carbohydrates and protein and maintains a healthy nervous system, healthy mucous membranes, healthy muscle and heart function and in general, promotes normal growth and development.[42] Choline is also a AAFCO recommended ingredient for kittens, which is important for neurotransmission in the brain and as a component of membrane phospholipids.[24] Biotin is another AAFCO-recommended vitamin to support thyroid and adrenal glands and the reproductive and nervous systems.[24] Kittens also require riboflavin (vitamin B2) for heart health, pantothenic acid (vitamin B5), and folacin.[42]

As of 2017, the domestic cat was the second-most popular pet in the U.S. by number of pets owned, after freshwater fish,[17] with 95 million cats owned.[18][19] As of 2017, it was ranked the third-most popular pet in the UK, after fish and dogs, with around 8 million being owned.[20] The number of cats in the United Kingdom has nearly doubled since 1965, when the cat population was 4.1 million.[21]
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