Fragile german shepherd?

by angelo
(lakeport ca USA)

hi I have a 1 year old gsd and he isnt as tough as i thought he would be. He is very smart but when he plays with other puppys younger than him he seems to get hurt often.

He is also very loving and I think he is too friendly when I bring friends to my house he immediately goes up to them wanting affection or to play.

Are GSD's fragile at 1 year of age? Do they act like puppys until they are 2 years of age? Thanks