There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
We also see plenty of cub adoptions by male lions and sometimes it can take a few days for a male lion to decide to off them. So its probably more a decicion than a instinct.
But the reason is probably just that he hasnt got much of a reason to accept them. They are annoying, take up valuable time and resources, a source of conflict and ultimately not part of his group.
Unlike the lionesses, which are only welcome becouse they bring food and mating.
Its not to different from humans. Which care for children also drops off sharply when there is no connection with the child.