Yes, he sounds like a typical land-shark GSD puppy to me. Perfectly normal. Keep up your obedience work and the classes. Try to find a trainer who is experienced with working breeds, or better yet, GSDs. There are lots of threads on puppy play-biting and loose leash walking if you do a search on this site. Try to be calm, consistent, and confident when working with your pup (easier said than done, I know!)--Dogs can sense frustration and uncertainty, I think. When I am training and getting frustrated, sometimes I have to walk away for a few minutes until I feel calm and in control again. This may differ for everyone, I'm sure, but I don't get good results from my dogs when I'm agitated. For example, I was trying to clip my puppy's nails a while back, and he was wiggling and not letting me work--even though we've done that many times before and he knows better. I was getting irritated. I had to let him go for a minute, take some deep breaths, and when I tried again, feeling calm and confident, he sat there without an issue and let me clip his nails.
I agree with Car2ner about the martingale collar. I've never used an e-collar, but I think your pup might be a little young for that. You might want to have your trainer teach you how to use a prong collar when your pup is 6-8 months old.
Last edited by sebrench; 02-10-2017 at 09:33 AM.