Mothering is one of those Skills for which there is inadequate preparation. There are classes, and much lore, and advice, but ultimately it comes down to an ability to Nurture. Each Mother does the best possible, but that does not guarantee much. ‘Possible’ leaves lots of room for interpretation.
What is pretty clear is how Nature provides internal systems which work most of the time for both the Mother and the Nurtured. It’s a peculiar collaboration, Growing Up. A hunt-and-peck effort for all concerned.
Rhinos are good at Nurturing, but no better than most other Critters. It’s a project where Good Intentions win the day.