Animal overpopulation is a serious problem. Many backyard breeders contribute to this problem by breeding and selling pets in parking lots, flea markets and other such venues. These pets are not vet checked, vaccinated, and often carry viruses and have genetic disorders or disabilities that require veterinary care that most cannot afford. These animals are often dumped, surrendered or in some other manner disposed of. This creates a burden on animal shelters and animal rescue organizations that are over burdened.