STORY HIGHLIGHTS
Editor's note: Pen Farthing has been named a 2014 Top 10 CNN Hero. All of this year's Top 10 CNN Heroes will be honored during CNN Heroes: An All-Star Tribute" -- Sunday, December 7 (8pm ET) on the global networks on CNN.
(CNN) -- Staff Sgt. Edwin Caba served in Afghanistan for nearly three years. Like his fellow soldiers, he longed for a sense of normalcy during his tours.
"We'd spend hours not sleeping, and rushing to eat meals, and staying on guard," said Caba, 26.
When a litter of puppies was born on the base where Caba served, the animals provided just the relief he needed.
Pen Farthing's group has reunited nearly 700 soldiers with stray animal buddies in Afghanistan.
"You walk in, and the dogs are wagging their tails, jumping on your legs and so excited to see you," Caba said. "You forget that you're halfway across the world, in a desert, with hostile things going on."
The soldiers began feeding, bathing and caring for the puppies, and Caba bonded with one in particular.
"She was sleeping on her back, with her mouth wide open, her tongue out a little bit and it was such a dopey thing to do -- and it's just like me," said Caba, who named the dog Cadence. "So I kind of knew that was it for me."
But a few months later, the soldiers' tour was coming to an end. Determined not to leave the dogs behind, they searched for a way to get them to America.
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Reuniting soldiers, dogs they left behind