Dubbed Pisper and Blinder (you can probably guess who was who), the dogs were taken to a local veterinarian. An infection was determined to be the cause of Blinder's condition. A full recovery is expected.
Along the way, Pisper and Blinder have become poster puppies for sibling loyalty. With so much national and global attention focused upon them, they're likely to be a good-news animal story from a place not entirely famous for happy endings.
Some 50,000 greyhounds, according to some estimates, are abandoned in Spain every year.
Even worse than abandonment, many dogs are routinely killed in what Vice magazine has dubbed a "greyhound holocaust."
"If the dogs are too old to hunt, or too hungry to afford until the beginning of the next hunting season, then a greyhound owner might choose to hang the dog instead," the article states.
From that darkness, a pair of unlikely celebrities has emerged.
Perhaps, it's the universal resonance of an unbreakable sibling bond.
El Refugio / YouTube