Here’s a lactation trick humans can only marvel at:
A kangaroo mama often nurses two babies (“joeys”) of different ages, meeting the individual nutritional needs of both simultaneously. She does this by producing milk of very different composition from each of her two breasts–one milk designed for the newborn and the other for the “toddler.” Protein and fat content differ considerably between the breasts.
Kangaroo lactation consultants certainly have their work cut out for them…