When I say "solitary pet", I'm not talking about dogs and cats, because these enjoy human companionship, and many of them can meet others of their own species when they go out. I'm not so sure about keeping a solitary pet if it is the type of animal that would naturally live among others of its kind.
I feel sad when I see a solitary rabbit in a hutch, or a single canary in a cage? I don't even like to think of a single fish on its own in a fish tank.
I used to keep rabbits and guinea pigs in the same hutch. My 2 budgerigars shared a cage with a canary, and various small finches shared an aviary. I still felt guilty when one little bird wove a neat nest out of grass and then laid an egg in it. Obviously the egg was sterile as she was the only one of her species in the cage.
Do you think that it is wrong to keep certain types of pet in solitary confinement? And which species are quite content to live alone?