OK, here's the deal. Our two youngest females, Sadie (1 1/2 yrs. - 30 pounds) and Josie (about 1 year - 54 pounds), have had a few spats, but last Sunday, Sadie went after Josie and got her ear pretty bad. In the past, after about 15-20 minutes, all was well and they were friends again. Not this time; we've had to keep them separated since.
After a bunch of dead ends, we called our vet who recommended Berkeley K-9 School for dogs in Inwood. The owner, Marvin Mason, came out to the house today to evaluate the situation and got us started on resolving the problem.
He confirmed our suspicion that Josie was reaching sexual maturity and trying to move up in status in the pack. We need to establish ourselves as the authority (alpha) and work on teaching the young ones some manners.
He definitely got the dogs attention and we really like him. Its going to take some work, but the problem is fixable. I think the hardest part is going to be training me