German Shepherd quesiton?

i have a 1 year old GSD and wanted to know when they are no longer puppies. She still chews anything left in sight and digs lots of holes. (she gets more than enough exersie and we have another dog to play with). Also she has started to become very protective of her ball and does nto let any other dog near it..how... show more i have a 1 year old GSD and wanted to know when they are no longer puppies. She still chews anything left in sight and digs lots of holes. (she gets more than enough exersie and we have another dog to play with). Also she has started to become very protective of her ball and does nto let any other dog near it..how do i cure this? i do not want her to become an agressive dog
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