updated 07/23/2014 AT 1:00 PM ET
•originally published 07/24/2014 AT 8:00 AM ET
For Miranda Lambert, home is where her dogs are.
The singer is currently mother to six adorable pups – Waylon, Bellamy, Cher, Delta Dawn, Jessi and Black Betty – and counting.
“I have a little plaque in my house that says: ‘There is always room for one more dog,’ ” she tells PEOPLE.
Lambert, 30, has been rescuing strays since she was a little girl, but it was her first shelter dog, Delilah, who inspired her to found the MuttNation Foundation.
“I started the foundation in 2009 along with my mom and two other board members, with the mission of raising funds to help dogs and shelters,” she says.
Now Lambert partners with Pedigree dog food to renovate shelters across the country.