Royal Canin Breed Health Nutrition Jack Russell Terrier Puppy Dry Dog Food is tailor-made nutrition created just for your Jack or Parson Russell Terrier pure breed puppy. This exclusive breed-specific diet is uniquely formulated for your small breed puppy， with the specific nutrients to help small dogs thrive. The specialized kibble is designed for your little dog’s rectangular jaw， making it easy for him to pick up and chew. An exclusive mix of antioxidants and vitamin E provides healthy development of his immune system. Precise protein content and balanced calcium and phosphorus levels promote healthy growth. And to support your puppy’s digestive system， high-quality proteins and prebiotics promote healthy digestion and optimal stool quality. Once your Jack Russell puppy is over 10 months old， transition him to Royal Canin Jack Russell Adult Dog Food for precise nutrition into the adult years.