Last Sunday, Hassan found a small brown dog outside his apartment building.
It had a red collar, but there was no name on it.
The dog looked hungry and scared, so Hassan gave it some water and a little chicken.
Then he took a photo and put it online.
He also made a poster and put it on the wall at the grocery store.
Two hours later, his phone rang.
It was a girl named Emily.
She lived three streets away.
Her dog, Coco, ran away that morning.
When Emily saw Coco, she cried and laughed at the same time.
Coco wagged her tail happily.