But at the centre, the pair have been enjoying a diet of "neck-chops from the butchers".
Mr Webb anticipates releasing them in around two month, back to where they were found.
The 4-week-old tui, which has yet to grow its white bib, was delivered to the centre after it was dropped into a Kerikeri vet by a member of the public.
"It gets very spoilt - oats, banana, orange, Complan drink [milkshake]. They get nothing but the best of food," Mr Webb said.
The tui - who would normally eat flower nectar or aphids - will stay at the centre for another three weeks, before it is released back in Kerikeri.
The kiwi came to the centre from a Department of Conservation reserve as an 320g egg at the start of December, which hatched on December 23.
"He's quite a gingery little male. He gets a bowl of food every night - oxheart meat cut up fine."
He currently weighs 260g, and once he reaches adult size at 400g, he will be able to go back to be released on DoC land, Mr Webb said.