Whenever I go and put the
dnkys to bed, I always take them a little treat and the closest I have ever gotten to their stable without disturbing them is a good few meters. 
Their hearing, obviously, is excellent as is their vision at night. 
This evening I approached them, ready to put them to bed and made it all the way into their stable without startling or disturbing them too much. 

George even ate his carrots from my hand, whilst he was sitting down!!!

They are so sweet, its quite overwhelming.