The phrase "unethical breeders" refers to individuals or businesses that engage in practices that are considered morally wrong or improper when breeding animals. Full definition
It is a growing concern in modern dog breeding, generally motivated by unethical breeders having dubious financial goals. (breedingbusiness.com)
But what about the need to protect the puppies that we sell from unethical breeders? (chercarkennels.net)
There are many unethical breeders selling puppies with serious health and behavioural problems stemming from poor breeding practices. (humanecanada.ca)