In Switzerland at the mo, 250g for about 6 euro.Where did you get rabbit liver?! I'm finding it hard enough to find rabbit these days....
I can't see why it's not allowed - any liver is allowed, surely?
If not (and I know you should stick to the rules - which I do, generally) then I'd have it anyway (says she who claims the liver from the rabbit each time we have it).
*Off to defrost a rabbit for tomorrow's PP Thursday*