Wombaroo Kangaroo Milk Replacer 0.4 is a stage-matched milk substitute for macropod joeys — kangaroos and wallabies — at the 40–60% point of their pouch life. At this stage, joeys are furless with darkening skin, eyes nearly opened, and ears beginning to erect. The 0.4 designation indicates the developmental fraction at which this formula applies.

Macropod milk composition changes significantly across a joey's pouch development, which is why stage-specific formulas are critical — a formula calibrated for an earlier or later stage won't match the joey's nutritional needs. The 0.4 formula supports rapid early development, including skeletal growth, immune function, and the neurological milestones typical of this pouch phase. Available in 900g packs.

Wombaroo's macropod milk replacer range is the standard reference for wildlife carers and rehabilitation hospitals across Australia. The 0.4 formula targets the developmental window where joeys are still fully pouch-confined but approaching the ear-erect stage — a narrow but critical period.