When resources are scarce other mammals do kill and possibly eat their newborns. Maternal instincts in animals go both ways.
The cases in the article have something in common. An environment perceived by the mother as not conductive to having and raising a child.
When a rabbit or rat kills newborns, it means something is bad wrong; this is always indicative of either a sick animal or a gravely defective environment.
A great deal of our human environment is cultural. Related to my point: we have a gravely defective culture.