Searching for kangaroo ended me up on this pdf table [0] of the percent of lactose in non-domestic mammal milk. Sadly, the table is null on that exact measure,

Searching for kangaroo ended me up on this pdf table [0] of the percent of lactose in non-domestic mammal milk. Sadly, the table is null on that exact measure, although they do have data on the amount of fat and protein in kangaroo milk. https://bionumbers.hms.harvard.edu/files/The%20gross%20composition%20of%20mammalian%20milk.pdf https://bionumbers.hms.harvard.edu/files/The%20gross%20compo...