“They Usually Aren’t Second Tier”: When Wolves Adopt Pups From Rival Packs
From IFLScience.com:
Nature, as majestic as it is, can be extremely cruel – especially to stepchildren. Lions that take over an existing pride make infanticide the first order of business; dolphins kill off unrelated calves specifically so they can mate with the mother; heck, even in humans, a new partner is more likely than the biological parent they’re replacing to kill or seriously injure a child.
