I have 2 seperate customers who have dogs that are going crazy digging up the lawn in diffrent places at random. It seems that they are looking for something rather than just digging. Could they be smelling grubs worms? This was my first thought but the lawns do not really show any signs of any grub worms or at least not any severe signs. We have been in a drought situation here lately. Anyone have any clues? Also, I know the dogs are doing it becouse I have seen them. It has happened about this time of year for the past 2 or three seasons. Any help would be greatly appreciated.