A Sumatran tiger in Italy is about to have a roaring good time now its toothache has gone away.
A zookeeper at Rome Zoo raised the alarm after noticing two-year-old Terima Kashi was chewing oddly, favouring one side of his mouth.
It turns out he had an infected canine and needed a root canal, which took three hours and was performed by a team of five vets.
Now on the mend, zoo vet Dr Klaus Friedrich says Terima Kashi has recovered well and can eat meat, but won't be able to chew on bones for some time.
But he's sure to be grateful - Terima Kashi is Indonesian for 'thank you'.
Meanwhile in the US, the big cats' loud noises are being used as research to help save the endangered species.
Zoos nationwide are capturing the sounds tigers make with special voiceboxes as part of The Prusten Project.
Executive director Courtenay Dunn says the research so far has discovered each tiger voice is unique, like a fingerprint.
It can be analysed to identify the animal's sex and eventually, the researchers hope, other information such as weight and age.
The information can be then used to help identify individual tigers in the wild, and help protection efforts by finding more accurate population numbers.