I never got close enough to find out !!
The rodent in question was amazingly docile. I think we'd just woken it up and it was a little confused ! It was just as well Brynney the GeoHound wasn't with us at the time !
It wasn't the first time the little bundle of fluff had been spotted, a previous visitor had noted the new 'resident' in the log book.
Without giving too much away, the siting of the cache provides a comfy little house for a small rodent. The cache container itself hasn't been damaged by said rodent, it's just being used as a roof.