Turn your back on a hungry giraffe who knows you have a pocketful of her favourite treats and you can expect to be ‘nudged’ into handing over the goodies. Stacey was quick to remind me, with a gentle head butt, that she expected my full attention, but it was more playful than painful. And as she was happy to pose for photos in return for the pellets I dropped on to her thick purplish-grey tongue, we were each rewarded by our encounter.