Here's some eligible batchelors:

1. Gunther IV - German Shepherd

Worth: £90 million

German Countess Karlotta Liebenstein left a staggering fortune of 139 million German marks (about £43 million) to her beloved pet dog Gunther III when she died in 1991. When Gunter III died, the fortune passed to his offspring – imaginatively named Gunther IV – who used it, through a mysterious group of human beings, to, among other things, buy Madonna’s eight-bedroom villa in Miami. Gunther’s property portfolio is also said to include estates in the Bahamas, Italy and Germany and is estimated to be worth £90 million.

2. Toby Rimes - Poodle

Worth: £45 million

Toby Rimes, worth the equivalent of £45m in dollars, is a descendant of a pooch left £15m in New York in 1931.

Or for those who think that's a bit desperate, how about a chimp?

3. Kalu - Chimpanzee

Worth: £42.5 million

Kalu, a chimpanzee, was adopted by Patricia O’Neill, daughter of the Countess of Kenmore, after she found her tied to a tree in Zaire. On her death Mrs O'Neill stunned her husband, the former Australian swimming champion Frank, by leaving her entire estate near Cape Town, South Africa, to Kalu.