For the second year in a row, Miranda Lambert has stepped up to make a huge difference in the lives of shelter animals all across America.

The singer's MuttNation Foundation is a 501(c)3 organization that has raised more than $1.5 million over the past seven years, to help improve the quality of life for shelter dogs. The Mutts Across America: 50 States/50 Shelters initiative provides much-needed financial support to 50 shelters across the country, with a minimum $3000 donation to each one. This year's campaign distributed a total of $206,000 to the participating shelters.

“I feel so passionately about helping all animals and I’m thrilled that we have once again been able to give to phenomenal shelters all across the country," Lambert says in a press release. "The people at these shelters do such amazing work day in and day out and are truly heroes for the animals.”

The shelters were chosen after meeting certain criteria regarding high adoption and low euthanasia rates, a focus on volunteerism and individual fundraising, fiscal responsibility, online presence, spay and neutering and more.

“In October 2014 we took over our first owned-and-operated shelter in Tishomingo, Okla., Redemption Ranch. Prior to that, we didn’t operate a shelter but we adhered to the belief that we should 'hold up the arms' of those who do," says Bev Lambert, Miranda's mother and MuttNation Foundation co-founder. "We are fortunate enough to have the funding again this year to continue this initiative which is so important. We believe the selected shelters stand as examples in the fight to end animal homelessness, abuse and neglect, as well as encouraging adoption, spay and neuter programs and avoiding needless euthanasia.”

MNF also continues to support the American Humane Association and Northshore Animal League, as well as Lambert's hometown shelters, Redemption Ranch in Oklahoma and Pet Fur People in east Texas.

Take a Tour of Miranda Lambert's Redemption Ranch