Help ID what breed our adopted puppy is.

Question
Hi there, we adopted our puppy Shep (10 months old right now) a few months ago. The shelter told us he's part Australian Shepperd but didn't know much else about his breed. I was wondering if you could help us figure it out so we know what to look out for as he gets older.

He's a bit hyper, and can get bored easily When he gets bored he tends to chew on things. We've bought him a number of chew toys but he didn't seem interested until we got a squeaky toy for him.

He's very fast and can corner easily. He chases the other dogs around at the dog park for hours. When he runs he hold his tail up and it curls up a bit. I haven't managed to get a decent photo ove him running though.

Here are a few pictures of Shep.

http://i121.photobucket.com/albums/o203/Karomie/Shep/viipics022.jpg

http://i121.photobucket.com/albums/o203/Karomie/Shep/stuff002.jpg

[IMG]http://i121.photobucket.com/albums/o203/Karomie/Shep/stuff003.jpg[/IMG]
we'd been playing in the yard and he didn't want me to leave. lol

Thank you for your help ^_^

Vii

Answer
I would say I see  a lot of lab in him more than anything,and labs are high energy dogs,as with most sporting breeds. I do see some type of herding dog in him as well so it is possible that he has Australian Shepperd in him as well,which is another high energy working breed.