When they do a fecal exam on the dog (which they did by taking a sample right from her rectum) and it is negative for worms, they wouldn't still give worm treatments, would they? After they did the worm test they never did say if it was positive or negative, just that she needed this plan of 5 worming treatments 2 weeks apart. Seemed a little excessive to me, but I haven't dealt with puppy worms for years and years, so I didn't question it. Should I?