This coming Sunday, July 31, has been dubbed "Mutts Day," and I can say from personal experience that nothing beats an adorable one-of-a-kind mutt. When you adopt a homeless mutt from a shelter, you not only gain a best buddy, you also save a life. But don't just take it from me—take it from these famous shelter-dog fans:

Of course, mutts aren't the only ones who are abandoned at shelters—it's estimated that a quarter of shelter dogs are purebreds who were dropped off after being purchased from a pet shop, puppy mill, or breeder. No matter what kind of dog you're looking for, you can find one at a shelter.

Maybe you can't buy love, but you can certainly adopt it.  

Written by Michelle Sherrow

After reading the last few posts about animal homelessness, euthanasia, and hoarding, some people might be wondering what they can do to help. Perhaps a few of you have even considered starting your own animal rescue group. If so, thank you for caring so deeply, but please—help us focus attention on stemming the flow.

Think of it this way: The animal overpopulation crisis is like water flooding into a sinking ship. We don't need more people bailing; we need to fix the gaping hole in the bottom of the boat! When it comes to ending animal homelessness, the most humane and sustainable solution is to pour our time, money, and effort into having animals spayed and neutered. Preventing more animals from being born stops the problem at its source. Here are some creative ways that we can work toward a no-birth nation: 

• Consider starting a program like the one run by Michigan's Heaven Can Wait Animal Haven, which transports animals to and from local low-cost spay-and-neuter clinics.
• Start a group to raise money for free spay-and-neuter surgeries for animals in your community.
• Hold fundraisers for local spay-and-neuter clinics so that they can waive the costs for low-income individuals and at-risk animals.
• Raise funds for PETA's "Spay and Neuter Immediately, Please" (SNIP) mobile clinic. 
• Take a hands-on approach in your community by volunteering for PETA's Animal Birth Control (ABC) program.   

Another crucial component of ending animal homelessness is educating the public about why it's so important to adopt animals instead of buying them from pet shops or breeders. If you are considering adding a cat or dog to your family, your decision will literally mean life or death for an animal waiting in an animal shelter. If you choose to buy from a breeder or a pet store, an animal at the local shelter must be euthanized. Please, always choose to save a life by adopting your animal companions from animal shelters or reputable adoption groups.

PETA has teamed up with dozens of celebrities—including Justin Bieber, Yvonne Strahovski, Lance Bass, Kellan Lutz, Joanna Krupa, Audrina Patridge, Patricia Arquette, and others—for pro-adoption public service announcements (PSAs). You can help encourage people to adopt animals, never buy, by sponsoring or obtaining free placement for one of these PSAs in a newspaper or magazine.

Thank you for caring. Animals like these are counting on compassionate people like you:

Like so many other rabbits, Bobbi was acquired on a whim and surrendered after her owners discovered how much time and effort are required to care for a rabbit. PETA found Bobbi a loving home, and she now enjoys playing with three other rabbits and sleeping in a bed with her new family.

One freezing day, PETA's straw-delivery volunteers found Sunday living in filth and mud, tethered by a chain that was only a few feet long. Sunday perked up immediately after PETA's volunteers gave him a doghouse and replaced the short chain with a new, lightweight tie-out.

Julie was once trapped at the end of a chain—one of the worst punishments possible for a dog, especially a collie—but PETA's fieldworkers convinced her owners to surrender her and helped place her in a wonderful home with a family who adores her.

Written by Lindsay Pollard-Post

celebrityviplounge / CC

Well, Jessica's thinking about opening her heart and home to a new pooch and word on the street is that she "wants a rescue dog."

We're thrilled to hear that she's thinking about rescuing a dog instead of buying one from a breeder. Today, we wrote to the star to urge her adopt her new friend from an animal shelter, pointing out that millions of dogs are euthanized at shelters every year simply because there aren’t enough homes for all of them. Even if she has her heart set on a particular breed, there are many purebreds at open-admission animal shelters and certainly many who are in the care of breed-specific rescue groups.

We hope, hope, hope that Jessica Simpson will join the long list of caring celebrities, including Charlize Theron, Katherine Heigl, Kyra Sedgwick, Audrina Patridge, and Alicia Silverstone, who have saved a life (or two or three) by adopting homeless animals.

Written by Karin Bennett