From the zoo's Facebook page:
"Sad news to report today. Due to persistent and worsening health issues, Malayan tiger Chira had to be euthanized on Friday. Here are some sweet words about her from one of her keepers...
It’s never easy to lose an animal ambassador but Chira was an especially hard loss. Ever since she was born, she had health problems. She always seemed to have at least one thing going wrong for her even when we thought we had her all figured out. But none of that ever stopped Chira from being happy. She still loved to interact with keepers during training sessions. She still loved to roll her whole body in paint whenever we painted with her. She still climbed to the top of her enrichment pole to get her bunny (the first of her sisters to do so). Nothing could stop her doing what she wanted and what she loved. Even when she didn’t always feel her best, she would still chuff (a happy tiger noise) more than any other tiger earning her the nickname “Chuffers”.
Chira made a huge impact on everyone who met her. All the keepers and vets grew so close to her through her many procedures and medical training sessions. There were times she felt awful and didn’t want any food and yet still did all her training to help us take the best care of her possible. I’ve had so many guests tell me about their experiences with epilepsy and how Chira inspired them. She was truly one of our greatest ambassadors and to say she will be missed is an understatement. This was one of the hardest goodbyes I’ve ever had to make and yet I am so happy I had the chance to work with her. She taught me to make the best out of every situation and to never stop chuffing."