Daddy had been trained in Schutzhund (protection dog work) and there was a lady working a horse who kept raising her whip in the air, which triggered Daddy’s training. It caused Daddy to react in a way that was not conducive to the training Cesar was trying to do.
Every time she would raise that whip, Daddy would react and Cesar had to continually correct the outbursts. He could have easily edited this out. It made Daddy look less than perfect and chipped away at the superhero vibe that Cesar had cultivated during the early parts of his career.