In the animal rescue world, a “bonded pair” refers to a pair of animals that should be adopted together. In most cases, they were either surrendered by their owner together or found together.
We adopted Lando and Rascal individually, Lando in 2008, and Rascal in 2011. By now, however, I’d say they have become a bonded pair!

Here they are snuggling under the same blanket! (Lando is the red rectangle and Rascal is the blue one.) I did not place the blanket over them; they did this themselves.
This is not to say that they have to be together 100% of the time, but I really believe that they enjoy each other’s companionship.
If you are thinking of adopting an animal, and you have the resources (time, money, space), then please don’t overlook bonded pairs! Double the cuteness, double the fun!