Eighty-two chihuahuas were discovered at a house "which looked like an earthquake had hit" after police were called to investigate a death.
The RSPCA were called to the property in Birmingham after police raised concerns about conditions.
Some had matted coats and fleas, others had burns, an RSPCA inspector said.
The dogs were found in April 2017 but the discovery is to be shown in an episode of Channel 5's The Dog Rescuers.
The couple who lived at the house had started out with two pets but did not get the dogs neutered and, after four years, they had 82 dogs, the RSPCA said. They said it was a classic case of hoarding, but the dogs had been loved.
The dogs were taken to the charity's Newbrook Farm Hospital.
"They (the dogs) literally started appearing from everywhere," Insp Herchy Boal said.
"We would move the washing machine and suddenly there'd be six faces looking at you. It was incredible where they were able to hide.
"We called out a vet who said the house was too hazardous and the dogs couldn't stay there, it was filthy and cramped. They were all hiding; barking and snapping at us."
Police launched an investigation after the woman living at the property died but found there were no suspicious circumstances and that she had died from complications after an accident.
https://www.bbc.co.uk/news/uk-englan...ngham-44601059