When Maalim the baby rhinoceros was discovered last month in Kenya’s Tsavo National Park, people thought he was an infant warthog because he was so tiny, weighing around 55 pounds and standing at just eight inches tall. The black rhino was quickly brought to the country’s premiere animal orphanage at the Sheldrick Wildlife Trust, just outside Nairobi, where he has bonded with his keeper who he follows day and night, according to the Daily Mail. Here, the grandson of Trust patron Dame Daphne Sheldrick, hand feeds Maalim who is still too weak to climb a low wall and needs 24-hour care, but has doubled his weight. “He is really just incredibly sweet,” one observer told the Mail. “He walks very gingerly and lightly and is clearly building his strength day by day.” The Trust plans to release Maalim back into the wild when he’s strong enough to fend for himself.