I recently had my does' butterfat tested and the nubian was 3.25 and the ober was 3.2. The ober doesn't have any cream at all separate out by itself, but the nubian has quite a bit. Is .05 that big a difference, or is there some other reason that one gives cream and one doesn't? PS I know a cream separator would do wonders, but that's not what I'm curious about. Thanks all!