Employees and volunteers at the Jasper County Animal Rescue League in Newton, Iowa are not strangers to sad, heart-wrenching cases at their shelter. But even they were shocked at the pup they saw left on their doorstep.

She had clearly been neglected and abandoned for months, and it's incredible to imagine how she survived for so long in such extreme conditions.

Warning: some of the following images are quite graphic.

(Source: Viralnova)

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