It might be that the drop can be attributed to it being a holiday weekend in the States with Father's Day and that there was an unusually low amount of advertising for this episode, to the point I wonder if kids even knew there was a new episode last weekend.
Whatever the cause, it's still the highest rated show on Discovery Family, so keep up the good work ponies!
Thanks to everyone for sending this one in.
Source
Twitter: Calpain
