Please reassure me it'll get better
We have an 11 week old male. We've had him for 3 weeks. Our first GSD. Although I've read a lot about GSD behavior, and know that puppies bite, I was really not prepared for the "landshark" stage. I constantly, constantly redirect, and while he has seemed to improve around me, as SOON as my kids (ages 6,9,12) wake up in the morning, come home from school, etc., he is chasing them, and almost seems to be attacking them. I'm always telling them to redirect him, although nothing seems to work until I physically go and get him. He'll bark at them, but not growl. He has shown some improvement, but there are still those times that his behavior scares me, because it makes me wonder what he's going to be like as he gets older. I do find myself getting angry with him, but do not ever punish with aggression, or put him in his crate (he likes his crate, and I want to keep him liking his crate!) I do sometimes put him on a leash while the kids are getting ready for school. Note: there are times when he's very calm, and the kids can pet him, even the 6 year old has him "sitting" and "staying". Also, he starts puppy school on Friday, and the entire family is going to make sure we're all on the same page.
I'm looking for reassurance that this is completely normal. I'm wondering if anybody else can share their story of being "afraid" of some of their puppy's behavior. I really think he just gets super excited to see them, and cannot control himself. Please tell me this will pass.