The short answer
Yes — kiwi is a safe, vitamin-C-packed treat in small amounts.
Why
Kiwi is very high in vitamin C, but it's also acidic and sugary, so a little goes a long way. The tiny black seeds are harmless.
How to feed it
Peel it and offer a small piece of the green flesh.
How much & how often
A small piece once or twice a week.