Visitors at the grooming competition in the small Kent village of Higham quickly turned violent when 2,000 people attended and traffic began to pile up.
One 18-year-old volunteer was punched by two separate men as he tried to manage the car park and angry dog-owners turned on the organisers when their pets lost, demanding compensation for a ruined bank holiday.
Rachel Hodges, who started the family competition five years ago, accepted 700 entrants and expected a maximum of 1,000 visitors at the village's Memorial Hall playing fields.
But the former Crufts-winning owner, 49, was so shocked by the scenes which developed she has decided to cancel all future events.
"I had rubbish thrown at me and I had abuse thrown at me. Girls in the tent who were taking donations were reduced to tears,” she said.
Enter your email and never miss out on receiving our best articles: