You beat me too it,that was going to be my advice,could not believe how well that product workedKinda hard to say, but if I were in doubt at this early point I would run not walk to the hydro store and get some Reverse Dutch Master makes it and give it to em. I have used it a couple times successfully.
I found some online from 5+ stores. I just used some as a preventive a few months ago and^^yep too soon to tell there. I've looked into DM Reverse..it's been taken off US shelves...there must have been PGR's or the like in them. I've also heard mixed reviews on the stuff fwiw. Best to just keep a careful watch on her. Best of luck!