Preheat oven to 350 degrees F. Lightly grease a baking sheet or line with parchment paper. Set aside.
In a large bowl, combine chicken, cream cheese, chives, onion and season with salt and pepper.
Unroll crescent dough from cans and press together two triangles to create one rectangle. (Make sure you press together the perforations well so your filling wont ooze out.) You should have 8 rectangles total.
Spoon about 3 tablespoons of chicken mixture into the center of rectangle. Fold each corner over the center of filling. Press together to cover filling entirely. Shape into a ball. Repeat with all rectangles.
Once all pillows are formed, dip each into the melted butter, and then coat in breadcrumbs. Shake off excess. Place each coated chicken pillow onto prepared cookie sheet. Bake for 20 to 25 minutes or until golden brown.