It is not recommended to shave an English Shepherd, as their coat serves an important function in regulating their body temperature and protecting their skin. English Shepherds have a double coat, which means they have a soft undercoat and a coarser outer coat. The undercoat helps to insulate the dog's body, keeping them warm in the winter and cool in the summer, while the outer coat provides protection from the sun, wind, and other elements. Shaving an English Shepherd can interfere with their natural ability to regulate their body temperature and can also put them at risk for sunburn, skin irritation, and other skin problems. It can also affect the texture and quality of their coat, potentially leading to long-term damage. If an English Shepherd's coat becomes matted or tangled, it's best to work with a professional groomer who has experience working with double-coated breeds. They can help to remove mats and tangles without shaving the coat, and can also provide advice on how to properly care for an English Shepherd's coat to keep it healthy and in good condition.