Overview
- Zoo caregivers observed weeks of progressive lameness after a knee injury, and the team made the decision in early September when his condition failed to improve.
 - Officials reported X-rays showing painful calcifications in both knees and bloodwork indicating early kidney insufficiency.
 - Staff noted a clear decline in well-being, including refusal to eat, lack of play, and signs of withdrawal.
 - The tigress Karis has been repeatedly searching the enclosure for Tebo, according to a zoo spokeswoman.
 - Tebo, born in 2009 and at Heidelberg since 2015, helped raise five cubs and displayed unusually active paternal care for a Sumatran tiger.