What color was the hair? A skim belly shot will be white hair. Brown hair is a body shot.

A high shot may not bleed at all....with any bullet. The blood collects down in the chest cavity. If you shoot above the lungs they will not aspirate it out. If you deflate the lungs they won't work and won't aspirate it out.

When I've had problems finding deer I will search out as far as possible -- typically I'm only limited by property lines -- as long as I have a reasonable idea I know where the deer would go to flee. Sometimes they can surprise you. I shot a deer with a bow through the center of the heart once and he went almost 200 yards with zero blood. Only found him by following the most likely escape route as far as possible.

Good odds those deer are dead, hope you can figure it out.