A two-and-half-year-old male chimpanzee named Dodo has been feeding the cubs every day for more than a year at the Samut Prakarn Crocodile Farm and Zoo.
Dodo's trainers at the zoo around 25 miles south east of Bangkok in Thailand initially just wanted to challenge the chimp. Since he showed no fear of the tiger cubs, they worked with him until he picked up the habit.
"It's not difficult as he knows how to hold the bottle. I just taught him to hold it and stay with the cub. I've been teaching him everyday so he can do it," said 35-year-old Sirinaj who has been working at the zoo for 20 years.
The only problems is when he ignores his feeding tasks and just plays with cubs – aged between three weeks to five months. The zoo said that the cubs will eventually outgrow Dodo and will need to be moved to an area more suited to their size.