Chairman Ms Greta Foules told the two women: "From the evidence seen on the video shown to the court about the condition of the house it is clear that the unnecessary suffering has occurred over a prolonged period of time."
Mr Kevin Campbell, prosecuting for the RSPCA, told the court that conditions at the sisters' home were "atrocious".
He said floors of the house were covered in up to six inches of "compacted dog excrement" and that many of the animals were caged in home-made kennels.
Vet reports later revealed that many of the animals, including, Jack Russells, King Charles spaniels and long-haired daschunds, were suffering from various eye, mouth and ear problems. Many of the dogs had to have their rotten teeth removed by vets.
After the hearing RSPCA inspector Garry Palmer said: "These dogs were kept in sickening conditions.
"These women were highly respected Crufts judges and the way they treated these animals left me and fellow officers disgusted and upset.
"The sisters were meant to set an example of how to treat dogs but they did not do that and let an appalling situation escalate."