Dysplasia causes abnormal wear of the joints, very common in large dog breeds; Gastric dilatation and volvulus (bloating) caused by overeating are also known phenomena in this breed of dog. Swelling and twisting of the stomach causes restricted blood flow to several major organs like the heart. Ear hematomas are caused by head shaking, which is also associated with ear mite infestation, causing the outer ear pinna to fill with blood, which can rupture. When it comes to Weimaraners, not every trip to the vet involves a genetic problem. It is not uncommon for them to suffer hunting-related injuries, such as a broken leg from stepping into a hole. They also sometimes require surgery to remove USOs (unidentified swallowed objects). In a puppy, growth continues until he is over a year old, so be careful when letting him play and watch out for long, intense walks during his puppy stage, this type of activity can be stressful growing bones and joints. Weimaraners need an effective meal to provide them with vital energy for the day; they must be fed two to three times a day..