The Cornwall branch of the RSPCA, which took in 13 dogs, said it was “desperate” to rehome them.
A new year appeal has been launched to rehome neglected shih tzus who were among 96 rescued from a Devon breeder.
The Cornwall charity branch, which took in 13 dogs, said it was “desperate” to rehome them.
He added that the dogs were undergoing a rehabilitation program and many were “terrified” of people.
The dogs have various health problems, the RSPCA said.
Sammy Howard, from the RSPCA in Cornwall, said there were now around 150 dogs following the rescue in Devon alone, as many were pregnant at the time.
She said the branch had successfully rehomed three dogs so far.
Ms Howard said: “We and all the rescues across the UK are desperately looking for a home for these guys.”
Potential owners will need to show “patience, understanding and support,” she said.
“These dogs have been here for 13 weeks and some of them still won’t let us touch them.
The RSPCA said new owners must be “patient and calm people”.
“They have had a difficult start to life and will not just fit into a home and be grateful that someone took them in.
“They will be terrified and it may be months before they start to trust people – which is hard to convince when you ask someone to welcome a dog into their home.
“We will not lose hope that there are people for these dogs.”
She said ideal homes would have a confident “established” dog, possibly cats and older children, and the owners would be “patient, calm people”.