A group of kittens is called a "kindle".
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Dolphins have names for one another.
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There was a cable network called The Puppy Channel that, for 3 years, broadcast only broadcast footage of puppies playing.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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