Currants are also known as zante currants or Corinthian currants and are dried berries of the small, sweet, seedless grape cultivar ‘Black currant’. It is not related to black, red or white currants, which are berries of shrubs in the Ribes genus and not usually prepared in dried form.
So can rabbits eat currants at all?
In particular, their acidic, calcium, sugar, fat, fibre, and phosphorus content is of most interest as far as rabbits are concerned.
As you can see currants contain a lot of phosphorus, a hint of sodium, and extraordinary amount of sugar, and acidic content
This means that rabbits cannot eat currants at all. They are just too acidic and sweet for rabbits to consume, even if its just one of them. Definitely a food to avoid giving to bunnies.