I didn't sob uncontrollably (like everyone else). Does that make me dead inside? Not that I'm saying I want to sob uncontrollably...

It's early yet, but this is a strong 2013 Newbery contender.

Strong parallels to Charlotte's Web (Is Ivan a loving tribute?): pesky but lovable scavenger character, complacent protagonist who gradually becomes aware of the injustice of his situation, highlights cruelty of humans, precocious young girl forms a bond with and protects animal characters.