I have personal experience rescuing two Boxers that were being mistreated. My male Boxer Tucker was found as a puppy at a flea market living in filth with cigarette burns on the top of his head. My female Boxer Daisy, unfortunately passed away in 2010. Daisy was kept in a cage in a garage for the majority of the first eight months of her life. Both Daisy and Tucker turned out to be wonderful dogs and companions and fortunately suffered no long term effects from their mistreatment as puppies.