Giant breed puppies take between 18 to 24 months to reach their expected adult weight of 45kg+. During this time, their nutritional needs change, which is why Royal Canin has developed two different food varieties to ensure optimum support throughout. Between months 2 and 8, your puppy can enjoy Royal Canin Giant Puppy, before switching to this formula - Royal Canin Giant Junior - for the remaining development months between 8 and 18/24 months. Royal Canin Giant Junior contains tailored protein to support muscle development between months 8 and 18-24. It also offers nutrients such as vitamins C and E, which can help to support the development of your puppy's immune system. Extra-large dogs often struggle with sensitive digestive systems, frequently suffering with diarrhoea and flatulence. The combination of beneficial prebiotics (such as FOS, MOS and beet pulp) and highly-digestible proteins support balance in the gut microbiome, supporting healthy digestion in the best possible way. R