I have a 5 month old / 50 pound male GSD who can get very rambunctious. He doesn't seem to understand his physical dimensions yet. He'll often run by and step on my feet or simply run into me when we're playing fetch. He can be very agile sometimes, but a little bit like a wrecking ball other times...
Am I corrrect to assume that he is just growing into / adjusting to his body? Should I be doing anything to counter this or will he simply outgrow it?