Partial amputation regrowth of P4 distal digit in an eastern grey kangaroo (Macropus giganteus): a case report

This case report describes distal regrowth of the fourth hind digit (P4) following traumatic autoamputation in a young adult eastern grey kangaroo (Macropus giganteus). Injury to P4 is generally considered to carry a poor prognosis due to its critical role in weight-bearing and propulsion during hopping. Following loss of the distal phalanx, the nail bed remained intact and healing progressed without surgical intervention. Sequential observations documented epithelialisation, preservation of the nail bed and subsequent formation of a keratinised nail structure. The animal maintained normal locomotion and body condition throughout recovery, including successfully carrying a pouched young. Long-term follow-up confirmed survival and reproduction more than 2 years post-release. While histological confirmation was not available, the observed pattern of tissue replacement is suggestive of a regenerative-like response rather than conventional fracture repair. This case highlights the importance of functional assessment over anatomical completeness in rehabilitation decision-making and suggests potential under-recognised plasticity in macropod tissue healing.