Yes Maxi junior is good for 4 month German shepherd dog Breed. You can also go through the specifically for Royal Canin German Shepherd Junior also.
As its name shows Royal Canin Giant Puppy is suitable for all the Giant Dog Breeds Like Great Dane,Bull Mastiff,English Mastiff,St. Bernard,Neapolitan Mastiff etc.
The dry dog food lasts for 1 year without any damaging or food poisoning, but those should have packed in tight seal pouch and required to keep away from moisturizing weather how much it is possible. After once opened the dry dog food’s pouch it should have to feed your dog within six months anyhow.
There are several branded pet food manufacturers that have been specially prepared for specific breeds, which are regarded as the adult/senior dog. The Royal Canin Labrador adult dog food or other branded dog foods such as Fidele’s senior dog food, Pedigree’s adult canine food, etc.
Royal Canin diets are the one of the best dog foods and such pouches are sealed tightly and after once loosen it, the pet owners can have them in a container and in this way they can preserve them for long days. Keep away from the moisture weather anyhow.