well after breeding my rabbits what feels like 100 times and having no luck, i finally came to terms with the fact i am the only one that can't get a rabbit to breed! And then last night one of my does had a baby.. (she was due on Nov 28....) i think it was fairly large.. but it had a bite on it's neck and was dead. i brought her in because we are having a storm and she has only had one other one.. and ate off its head! i couldn't really tell.. because it's head was missing, but i think it was significantly smaller than the one from last night. She is an AmChin so usually has large breeds. it's been quite a while.. i wonder if she has any more..
Try palpating.