The site Scienceray gathered 12 cases, some very unlikely of romantic relationships between animals are expressed by means of an apparent friendliness or adoption.
Examples like a dog taking a squirrel (pictured above), a nut that creates tiger cubs, a lioness who has already adopted the third antelope, a curious interaction between a snake and a hamster and so on ...
It is worth knowing the history of each case and draw your own conclusions.
And as I said the French philosopher Blaise Pascal "The heart has its reasons which reason knows nothing", who can claim that animals do not feel what they feel or practice beyond one's own instinct huh?
Anyway, they still teach us so much ....

Tip given by Attila via Twitter