My Dog was licking her inner back thighs, so we checked her and what we thought might be a rash, we saw little black specs like sand. No, she does not have fleas, could this be dead flea eggs? She is on Frontline for fleas and ticks.
Sounds like flea dirt (flea droppings) to me, but that'd wash off if it were. Have you given her a bath recently? Give her a bath and see if the black specks wash off... if they are flea droppings, they will. When was the lsat time you applied the frontline on her? Frontline isn't as effective on some dogs as it is on others, you may need to consider changing to Advantage or Advantix if it does end up being flea droppings
If the black specks don't wash off, you may need to consider having her checked out at the vet.