Poor Davey is so young, which essentially means that his entire life so far has been filled with sadness and abuse. No one deserves that, especially a tiny, harmless puppy. Davey wasn't expected to survive - but this puppy proved that he is an incredible fighter.
The volunteers taking care of Davey have had to feed him in small amounts, nine times a day - rather than regular amounts, fewer times a day - because he is so eager for food that he scarfs it down too quickly. Clearly, Davey knows he is the underdog and is trying his best to do everything that he can to recover. For such a little guy, he sure has a lot of determination.