Many U.S. veterans are struggling with invisible wounds such as post-traumatic stress disorder, anxiety and depression. But some of them are finding peace at home thanks to their canine companions. Click through the gallery to meet a few veterans and the service dogs who help them get through their daily lives.
Lobo helps Jeff Wilson keep cool in public places. Wilson doesn't like being startled, so with a simple "watch my back" command, the border collie-German shepherd mix watches Wilson's 6 o'clock and gives him a little nudge if anyone walks up behind him at the grocery story or other public setting. If Wilson's anxiety kicks in, Lobo will jump and put his paws on Wilson's chest to give him something else to focus on.
Before she met Vito, Ana Sarver would average about two hours of sleep a night. Like many veterans with PTSD, she would struggle with restlessness, nightmares and hypervigilance. With Vito, "as soon as he feels me restless, he wakes up and he wakes me up and brings me out of it. ... He keeps me from getting up in the middle of the night and pacing every which way." Vito also gives Sarver the ability to function during the day. With the dog at her side, Sarver feels more comfortable in social settings such as restaurants.
David Angel Leos returned from his second tour in Iraq and found his life falling apart: "I was drinking, family life was really tough. Nightmares, constantly. Flashbacks." He had lost many of his close friends in the war, and he was struggling with extreme PTSD. But after being matched up with Shadow, he has been able to find some peace. "Having him is like having a battle buddy with you, somebody who is going to watch your back -- knowing if you don't see it, he will."
A trip to the grocery store used to send James McQuoid into a panic. When the Iraq War veteran heard a child crying, he remembered kids screaming in Falluja. Coins jingling in the register reminded him of ammunition carried around a soldier's neck. But Iggie calms McQuoid in public places, creating space between McQuoid and others. He also wakes McQuoid from nightmares and keeps his overall anxiety level down. "Without Iggie, I would still be in my house ... probably divorced from my wife and very estranged from my son," McQuoid said.
When Jeremiah Gaches came back to the United States, he isolated himself a lot. But after he met Rocky, Gaches found it much easier to get out of the house. Rocky watches Gaches' surroundings so the veteran doesn't always have to be at high alert, and if Gaches is feeling uncomfortable, Rocky will calm him down. Now, Gaches said, he's comfortable talking to people in public, and he's helping to train other veterans and their service dogs.
Shadow is the only reason Jennifer Haeffner goes out in public these days. Before she and the Labrador-Burmese mountain dog teamed up, she essentially had been housebound for five years, considering herself lucky if she got out once a month for grocery shopping. Now, she and Shadow go out several times a week, and he wakes her up from nightmares and picks things up so she doesn't stress her bad back and hips.
When Nick Udall returned from Vietnam, he found it very difficult to be in a crowd. He was always on alert, looking for exit strategies "if something happens." Annie is vigilant so he doesn't always have to be. She also helps remind him to take his medicine, running up to his chest and sticking her nose in his face. "I take anti-anxiety medicine, but I get the same effect by holding her," he said. "The reason I hold her up here like this is as soon as I do just -- whoosh -- I can feel the stress go away. It's amazing."
Veterans and their service dogs
Jeff Wilson and Lobo
Ana Sarver and Vito
David Angel Leos and Shadow
James McQuoid and Iggie
Jeremiah Gaches and Rocky
Jennifer Haeffner and Shadow
Nick Udall and Annie
STORY HIGHLIGHTS
- Many Iraq and Afghanistan war veterans are suffering from post-traumatic stress disorder
- Some are finding it easier to cope with their symptoms thanks to service dogs
- The dogs help them with their anxiety and give them the confidence to socialize again
- Top 10 CNN Hero Mary Cortani helps veterans in California train their own service dogs
(CNN) -- He was antisocial and difficult to work with at first. He'd clearly been abused by his father as evidenced by the deep, round scab near his shoulder. He hadn't been eating well.
And he was so skittish that the slightest noise or motion set him off. But Army veteran Jeff Wilson needed a new dog, and this pound puppy -- a border collie-German shepherd mix -- was it.
He named him Lobo, and it wasn't long before Wilson, 44, realized they had the same issues.
"We were kind of kindred spirits," he said. "I think it really helped deepen our connection because he wasn't just helping me; I was helping him. I was helping him get past the same obstacles that I had. I had to recognize it in myself and get past that to help him."
Wilson is a former tank commander and flight engineer who isn't at liberty to speak about his time in Iraq other than to say he manned a machine gun while hanging out of the door of a helicopter. He can also say that he was often "exposed to very dangerous situations" during his 14 years in the service.
He has been diagnosed with depression and anxiety from post-traumatic stress disorder, and he's not alone. According to the Department of Veterans Affairs, 11% to 20% of Iraq and Afghanistan war veterans are suffering from PTSD.
Wilson said his depression turned him into a hermit. He would "curl up and not talk to anybody," and his anxiety made it difficult to go into public.
If he did leave the house, he was hypervigilant. If someone walked up behind him or dropped something that emitted a clatter, it triggered the "fight or flight" mechanism he'd groomed in the military.
Inside the mind of an Iraq combat vet
Top 10 CNN Hero: Mary Cortani
Pushpa Basnet was shocked to learn that children in Nepal were living in prisons with their parents. In 2005, she started a children's center that has provided housing, education and medical care to more than 140 children of incarcerated parents. "I always had a dream to build our own home for these children, and I want to rescue more children who are still in prisons," Basnet said. See more photos of Pushpa Basnet, who was voted CNN Hero of the Year for 2012.
Wanda Butts lost her son in a drowning accident six years ago. In his memory, she started the Josh Project, a nonprofit that taught nearly 1,200 children -- most of them minorities -- how to swim. "I started the Josh Project to keep other mothers from having to suffer such unforgettable loss," she said. See more photos of Wanda Butts
Mary Cortani is a former Army dog trainer who started Operation Freedom Paws, a nonprofit that helps war veterans train their own service dogs. Since 2010, she has worked with more than 80 veterans who have invisible wounds such as post-traumatic stress disorder. "I'm hoping this brings awareness to the world that PTSD is real and that we will be able to reach more veterans who so desperately need help," Cortani said. See more photos of Mary Cortani
Catalina Escobar is helping young moms in Colombia, where one in five girls age 15-19 is or has been pregnant. Since 2002, her foundation has provided counseling, education and job training to more than 2,000 teenage mothers. "Teenage pregnancy is a world poverty problem, and we have developed models of intervention that break the cycle," Escobar said. "I want to share it with people around the world." See more photos of Catalina Escobar
Razia Jan is fighting to educate girls in rural Afghanistan, where terrorists will stop at nothing to keep them from learning. She and her team at the Zabuli Education Center are providing a free education to about 350 girls, many of whom wouldn't normally have access to school. "This honor is a God-given gift that will make it possible for me to continue to give a ray of hope to these girls," Jan said. "My goal is to break the cycle of violence." See more photos of Razia Jan
Thulani Madondo struggled as a child growing up in the slums of Kliptown, South Africa. Today, his Kliptown Youth Program provides school uniforms, tutoring, meals and activities to 400 children in the community. "We're trying to give them the sense that everything is possible," he said. See more photos of Thulani Madondo
In memory of his daughter who was killed by a drunken driver in 2007, Leo McCarthy started Mariah's Challenge. The nonprofit gives college scholarships to teenagers who pledge not to drink while they're underage. Nearly $150,000 in scholarship money has been awarded. "We can change an apathetic culture of teenage drinking and driving," McCarthy said. "Hopefully one day soon we will not need Mariah's Challenge." See more photos of Leo McCarthy
Connie Siskowski is helping young people who have to take care of an ill, disabled or aging family member. Since 2006, her nonprofit has provided assistance to more than 550 young caregivers in Palm Beach County, Florida. "I can only believe that when more people understand about this precious population, they, too, will want to recognize and support them," Siskowski said. "These children suffer silently behind closed doors." See more photos of Connie Siskowski
After beating his addiction to drugs and alcohol, Scott Strode found support through sports. Since 2007, his nonprofit, Phoenix Multisport, has provided free athletic activities and a sober support community to more than 6,000 participants in Colorado. "This is an opportunity to shine a light on individual stories of recovery and sobriety in a way that will help remove the shame and stigma that surrounds dependency and addiction," he said. See more photos of Scott Strode
Malya Villard-Appolon is a rape survivor dedicated to supporting victims of sexual violence in Haiti. In 2004, she co-founded KOFAVIV, an organization that has helped more than 4,000 rape survivors find safety, psychological support and/or legal aid. "This encourages me to continue to fight on behalf of women and girls who are victims," she said. "I hope it brings about a change for my country." See more photos of Malya Villard-Appolon
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
The top 10 CNN Heroes of 2012
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The top 10 Heroes: In their own words
The anxiety was so bad that before he was diagnosed with PTSD, he went to the emergency room four times because he thought he was having a heart attack. He "self-medicated" so heavily with booze that it strained the relationship between him and his now-wife of two years.
"I was having to drink to numb all my senses and be quasi-normal," he said.
But today, with Lobo by his side, Wilson is finding it easier to cope.
The two have been working with Operation Freedom Paws, a nonprofit in Gilroy, California, that helps veterans train their own service dogs. It is run by Mary Cortani, a veteran and one of the top 10 CNN Heroes of 2012.
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When veterans train "their own service dog, there are immediate benefits right off the bat," Cortani said. "They have a mission and a purpose again. It gives them something to focus on and to complete. It gives them a sense of security and safety. ... They know they're not alone. They've always got their buddy at the end of the leash."
Now Wilson tells Lobo, "Watch my back," and his four-legged friend stands behind him and gives him a nudge if anyone approaches. When something stokes Wilson's anxiety, Lobo senses it, jumps up and puts his paws on Wilson's chest so he can redirect his focus.
"Knowing he's there makes me comfortable," Wilson said. "I'm not worried about the attacks. I still think about them, but I'm not hampered by them. I can go to the movies."
A study on hold
The Veterans Affairs Department recently put a study on hold that would determine the effectiveness of canine therapy for troops suffering from PTSD. Until that study is complete, the VA will continue providing dogs for a variety of ailments, but not PTSD.
Sen. Johnny Isakson, R-Georgia, co-sponsored the 2009 legislation that kicked off the study. He was inspired by the strides that dogs helped his mother make from 1995 to 1998 after she was stricken with Alzheimer's.
"She wasn't very fond of dogs at all, but when she developed Alzheimer's, they became a key part of her therapy," the senator said. "She was unable to really communicate at that time, but you could easily tell, emotionally, the calming effect the service dogs had."
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Gen. Chiarelli on treating PTSD and TBI
Service dogs help war veterans recover
Dogs: A medicine for mental health problems?
Isakson said the VA is rewriting the parameters of the study to take into account the dogs' temperaments and the importance of matching the trainers, not just the dogs, with the patients.
Yet not everyone is convinced "the VA has the right stuff" to conduct the necessary experiments, said Corey Hudson, CEO of Canine Companions for Independence and president of the North American chapter of the umbrella organization, Assistance Dogs International.
Hudson said he hopes the study will be large enough to consider the broad gamut of symptoms associated with PTSD, as well as the anecdotal evidence suggesting canine companions can help tug the disorder's sufferers from their shells.
"There's something mystical and magical about dogs and people and placing them together," said Hudson, who has "worked with and against the VA" during his 22 years of experience with assistance dogs. Canine Companions for Independence has more than 900 puppy raisers and works to pair veterans with dogs regardless of whether the VA shells out for it.
Hudson doesn't cite scientific studies, such as the one that says canine interaction increases a human's level of oxytocin, a hormone that reduces anxiety and blood pressure.
Instead, he speaks about how dogs love unconditionally and don't judge. He explains how they naturally spark social interaction -- "Cool dog; can I pet her?" -- and how ownership precludes people from locking themselves in their homes, away from society.
"You can also use them as an excuse to get out of things or leave early," Hudson said.
Case in point
Shadow is one pooch accustomed to being used for such occasions.
The 2-year-old Labrador-Bernese mountain dog mix is the inseparable pal of Jennifer Haeffner, a seven-year Army veteran who had been housebound for about five years before meeting Shadow in the summer.
"He's a very active dog. It makes me do things. I don't have the option of hiding in the house. I have to go out," said the 41-year-old Ripon, California, resident.
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During Operation Desert Storm, where she served for about nine months between 1991 and 1992, she was sexually assaulted on multiple occasions by other service members, she said. It's a fairly common occurrence that befalls about one in four women in the military, according to the VA.
He's a very active dog. ... I don't have the option of hiding in the house. I have to go out.
Jennifer Haeffner, on her dog, Shadow
It left her feeling alone in the world. She wanted to disappear. She forgot how to deal with people and eventually became a recluse, considering it a "good month" if she got out just once to shop for groceries.
She didn't attend any of her large family's gatherings. Too many people and too much noise, she said. It terrified her.
"For years after that, I would go out and wander the streets late at night, just hoping someone would kill me because I wasn't brave enough to kill myself," she said.
About five months ago, her therapist recommended that she meet Cortani.
Cortani recalls Haeffner wouldn't look her in the eye when they met. Her leg bounced when she spoke, and she pressed her fingernails into her arm. Her boyfriend was constantly by her side.
"You could just tell the pain and the anguish that even meeting me for the first time was causing," said Cortani, an Army veteran herself.
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Operation Freedom Paws teaches participants to train their own dogs, to customize their behavior. First, the dogs learn to sit, then heel -- the basic stuff.
Shadow now knows how to pick things up for Haeffner so she doesn't put stress on her bad back and hips. He acts as a barrier, physically putting himself between her and any new people she meets.
When she wakes up feeling gloomy, he lets her stay in bed and pet him until she's ready to face the day. If she hears a sound during the night, he stays by her side as she checks it out, and Shadow is quick to snap her out of nightmares.
"He'll breathe on me or lay his head across mine to wake me up," she said of her 55-pound companion. "If I'm in a bad mood, he'll come over and insist I play with his toy or lay his lead in my lap or lick my feet -- cheer me up."
Cortani said the difference between the Haeffner of five months ago and the Haeffner of today is like "night and day."
She builds friendships. She's been to the aquarium. She's gone horseback riding. She goes places without her boyfriend.
"She's creating her own new normal," Cortani said.
Added Haeffner: "I'm much better now. I'm happier."
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CNN's Christie O'Reilly contributed to this report.