actually, dogs are predators, like cats
predators tend to point their senses toward what takes their attention.
prey animals tend not to as a constant process.
they may alert to something but not point
they spring off instead of freeze and point, some do many dont, and all tend to have a mix of both
but dogs and cats tend mostly to always direct their head direction toward what takes their attention.
humans conceptualizing that as "seeing" is just human language and anthropomorphism
when dogs & cats stalk prey they may point their head in a slightly different direction to help camouflage their outline in the terrain, but will track with the side of their eyes.
however they point in the direction they are heading even when they are circling around something.
the natural alert process of a cat or dog is to always point the head except when in a non lethal scenario when they will track something with their ears
pet owners see them doing this in the house and garden often.
"ear tracking"
it is not uncommon for cats and dogs to have specific character unique trait's to hunting and killing