OK, before things get out of hand here, I'm going to freeze this thread.
And yes, it is customary to only charge one processing fee/ office fee, no matter how many horses are entered. Is it fair to the person who only enters one horse? On the other hand, is it fair to charge someone who is entering multiple horses to charge them each a processing fee? I do know a producer who tried a processing fee on each horse, and another one who incorporated the processing fee/office fee into the entry fee. Neither of these were well received by the contestants and alot of feeling got hurt.
There have been numerous topics/threads on this subject. Just do a search, and if you don't find the info you require, start a new topic, but PLEASE, try and keep the information general, and not directed and any one person.