Here is a category fic rec :^) This is one of larry as animals, just pure fluff. These are just so adorable.
1) did the sun just come out (or did you smile at me) by writtensoul
Words: 2K
https://archiveofourown.org/works/801372
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if harry and louis were cats louis would be the white pretty specifically breeded cat that the owners give fancy food to and a special bed with jewels on the sides and harry would be the stray that ran in and he would be brown-haired and happy about life and wanting to play with louis and louis would hiss and tip over the glass of water and run away so it looked like harry did it but at night louis would climb down from his pretty bed and go to harry's cardboard box and snuggle
(aka louis and harry are actual cats)
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2) 'Cause It's Not the Pebble, It's the Penguin (series) by orphan_account
Words in the series: 1.5K
https://archiveofourown.org/works/1037229
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Louis and Harry are penguins. I apologize for nothing.
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3) Scootch On Over Closer, Dear (And I will nibble your ear) by sweetums (only accessible for ao3 users)
Words: 589
https://archiveofourown.org/works/1171976
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Cat!Larry drabble
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4) old macdonald had a farm by louistomlinsons *all the boys except zayn are animals*
Words: 5K
https://archiveofourown.org/works/20115106
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Louis is a hedgehog, Harry is a fish, Niall is a parrot, Liam is a golden retriever, and Zayn is Zayn. It's a crazy twenty-four hours.
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Feel free to share your thoughts about these lovely fics !!