A few thoughts to consider
I am a FT Judge, and not a HT Judge
I don't know if rules say a Jr consists of 4 series where each bird is considered to be a seperate series. I believe they do say the dogs should be tested on both land and water
I'm a bit skeptical in light of the fact that there is no requirement that a Master have a set number of series; only that they get all the requirements in be it in 3, 4 or whatever # of series.
I also assume that one of the judges duties is to inspect the bird to see that the bird is suitable for table fare and has not been crushed or chewed up by the dog
If so the judge would be correct to demand the delivery so as to inspect the bird and possibly eliminating the dog; before continuing test by throwing another bird for this dog.
Again not a HT judge