Siblings look out for each other.

These two pit bull puppies, Jeffrey and Jermaine, are brothers who were rescued in Pennsylvania by Operation Ava.

The shelter said they've received several applications for adoption, but what makes this story truly touching is the fact Jeffrey is blind and Jermaine has taken upon itself to serve as his guide dog.

Operation Ava says Jeffrey and Jermaine should be adopted together, which sure looks like it would be the best thing for them.

This actually isn’t the first time there’s been a guide dog for another pooch, either, which just goes to prove man’s best friend is also dog’s best friend.