Giant Schnauzers require regular grooming. Their beard can collect drool and food particles, making frequent cleanings essential. Giant Schnauzers require regular grooming. Their beard can collect drool and food particles, making frequent cleanings essential. If being shown, their coat needs to be stripped every two to four weeks. If they are simply a companion animal, the coat can be clipped instead. Some Giant Schnauzers have an allergy to shampoo.Hip and elbow dysplasia are common.