Purchased, then abandoned
About 25 percent of dogs that enter shelters likely are purebred. Many were purchased as puppies and when they got bigger or their owners grew tired of them, they were dumped at city pounds or shelters.
According to the ASPCA, pet problems are the most common reason that owners re-home their pet. Pet problems are defined as problematic behaviors, aggressive behaviors, growing larger than expected, or health problems the owner couldn’t handle.