Infancticide, not for the squeamish.
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"Infanticide is a common practice in most mammals. Male lions use infanticide to get rid of offspring in a newly acquired pride that are not genetically related to the male coalition. Solitary males are also capable of killing the offspring of an encountered pride. Female lions have also been observed to kill cubs from a rival pride, but they would never kill cubs from their own pride. The dead offspring are sometimes consumed as an energy source and other times they are simply just eradicated for the sake of it. Older cubs and sub-adults have a better chance of being able to escape incoming infanticidal males than younger cubs."