The bond between man and beast, or in this case a dog. It is presented how beings such as animals like ourselves are not so capable of living independently even though we think we are - as "higher" beings. We go back to the thinking: "Everything is connected to everything else". We see here the mutual relationship between man and his best friend.  Possibilities would be a greater look on the live of both Mang Ed and Bantay. How they came to be, because it would seem like an interesting story. A lame man, guided by his dog. How so were they able to go about their day. What would a normal day be like for them? To what extent their relationship goes. I bet it's a rather wonderful one as opposed to this sad story of them forever parting.