The best dry food for your English Springer Spaniel will depend on their specific dietary needs and any health conditions they may have. In general, high-quality dry food that is formulated for adult dogs and made with high-quality protein sources, such as chicken or fish, is a good choice. It's also important to look for food that contains a balance of nutrients, including vitamins, minerals, and antioxidants. It's always best to consult with your veterinarian when choosing a food for your dog, as they can take into account any health conditions or allergies your pet may have. They can also recommend brands that are known for their quality ingredients and nutritional value.