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I'm Charlotte Unembrook, a zoologist,
and you're listening to Shiba, just like us, from the documentary on the BBC World Service.
Shiba is a chimpanzee.
She was born in a cage, raised in a zoo, and then spent 24 years in a laboratory.
As I learnt more about her story, I kept hearing the phrase, we have the need, but do we have the right?
Having studied chimps in the wild for years,
I've always found it hard to accept experimentation on animals, especially ones that are so like us.
The justifications and counterarguments have raged for decades,
and although attitudes have changed, the debate is still unresolved.
In the next hour, I explore our conflicted relationship with the animals we use and the struggle to set them free.
But first, let's meet Shiba.