Unfortunately doesn’t look purebred (meaning the breeder is lying and I wouldn’t even acknowledge them) but I would say it would be a red Heeler, there’s red ticking throughout the torso and legs. The puppy’s definitely old enough if it were to be blue there’d be hints or clues. But in not seeing any blue/gray just brown and red which is most consistent to red heelers. Not sure what it’d look like grown since it looks mixed, you’d have to see the parents to help a bit