yes i'm afraid they are, but I think maybe over a matter of time rather than immediately. Please correct me if I'm wrong anybody!!!!
Some things are fatal almost within hours and other things affect the body over a matter of time if supplied on a regular basis.
If your bunny has been ok up to now, then it should be fine :wink: , but don't give pips any more.
I don't even give mine grapes that have seeds in, only seedless, washed and with the stalks on. Before, I used to spend ages picking all the grapes off the stalks :lol: