It appears on at least one "safe" list without any "don't feed the peel" warning. Just remember that fruit is high in sugar (especially kiwis" and too much sugar is a bad thing for rabbits. I'd give a taste but not much more.
Yep. When I was having GI trouble I made my own smoothies out of kiwi, banana, and berries since those were the only fruits I could tolerate and the only type of fiber I could tolerate. The rabbits got all the peels and never suffered from it. Since I was only feeding the house rabbits I split it between 2 days since it was 20 kiwis and 8 bananas at a time.
I only give them kiwis that are too sour for me to eat. They may be too sour for them too cause they are usually only half eaten for a while before disappearing. They keep a long time in the fridge so you probably didn't have to give them to the rabbits.
What about leaves and branches? My neighbor has a 'tree/shrub/tangle' of kiwi and I would love to have a reason to hack away at the portion on my side of the fence...BTW, he is cool with it...