6 month old--Knees turn out a little, is this normal?

[missykel3]

I have a 6 month old male GSD, and I have noticed for a while now that his hind knees turn out a little. Is this normal...should I be concerned about it? He doesn't limp, and can run and walk just fine. He just points his knees out a little. This picture shows it, and his legs don't straighten at all when we walks or runs. He walks more on his inner toes instead of putting his weight evenly on his foot. He is on a balanced raw diet with calcium/phosphorus ratio 1.2/1. Also, he loves to play fetch, but I noticed he hits hard when he goes after the toy, and often splays his legs out even more when he lands on the toy. Should I avoid this play while he is still developing, or do you think it is ok? Thanks for any tips

[1sttimeforgsd]

He is a handsome fellow, do you have some other pictures it is kind of hard to tell from that one?