A brief history of Elon Musk's pets, including a 'nasty, brutish' Yorkshire Terrier named after a 17th century philosopher, and a cat called Schrödinger

• Elon Musk said he once owned a "nasty, brutish" dog for 15 years that bit people on the ankle. 
• The father of nine has occasionally posted about his pets on social media, including dogs and a cat.
• Insider compiled a list of the billionaire's known pets, including one that inspired a crypto meme coin.

Billionaire Elon Musk may be the father of nine children and the boss of five major companies, but he still has time for a handful of four-legged friends.