I'm very sorry that this is your first post . . . puppies biting everything is very normal and anyone who decides to get a GSD should educate themselves and be ready and accepting of the puppy biting. Going through the biting stage is very important for them to be able to explore and test their environment, develop bite inhibition, and just be a normal, happy, bouncy, growing pup. If you prevent the puppy from using his mouth in a way that nature intended to, you will have a puppy that missed out on some very important life lessons.
Pups using their mouth is like toddlers learning to use their hands to interact with the world. You wouldn't tie a toddler's hands behind their back because "they keep grabbing stuff", what you would do is suppervise the child, and give them age-appropriate toys to grab and play with. Same with pups.
When they want to bite, they want to play. It makes no sense to punish a normal puppy for acting in a normal way. The way to deal with it is to redirect to appropriate puppy toys, and play and interact with the pup. They learn that the way to get attention and fun is through playing with toys.
Lots of info here: https://www.germanshepherds.com/forum...nhibition.html
Also the muzzle you have on the pup prevents normal panting and should only be used for short periods of time, during emergencies. Please do not muzzle your dog and learn on how to deal with the biting (mostly, accept it, he will grow out of it). This pup is just too cute and adorable to not be given a chance to develop and grow normally.
I also would like to remind all following posters, as a Moderator, to post helpful
information about bite-inhibition, and to avoid
attacking and bashing the OP (thank you posters so far
). There is a ton of good info here, I sincerly hope that Vince hangs around for some good pointers and some support through the puppy biting phase (they DO grow out of it!!! Patience!)