I just heard nibbling on my rivita packet in the lounge around 11:30 I quietly went in to see a thin tail round the back of the plant pot next to the rivitas. I nudged the pot and saw the rodent in full. It didnt look like it was big enough for a rat, yet it was almost black, about 6 inches long, couldnt see the tale tale pink ears. The tail was definitely thin and not that long. Is this a young rat or a house mouse?