It doesn't sound like aggression to me. Puppies are exuberant, and do not have appropriate boundaries, which they need to develop as they mature. Since puppies play with each other by biting they don't understand that this is not appropriate with people.

I recommend that you make sure there are lots of good soft stuffed toys available, and watch your dog closely when he is zooming. Hold a toy in your hand and if he starts to jump towards your arm, stuff the toy into his mouth instead. Play tug or fetch with him. Distract him and redirect his attention to the toys instead of to your body. If you do this consistently you can avoid getting his mouth on your arm. If he manages to grab you unawares, say "ouch!" very loudly, and then leave the room, shutting the door behind you. Stay away for five minutes, then return. Repeat as needed. Your puppy wants your companionship; he will learn that he can play with you with toys, but the moment his mouth connects with your body all the fun stops, and you go away.

Be patient and 100% consistent with this. It will take a little time, because he is a puppy, but he will learn.

 

Thank you for this. I will try everything you suggested. I must learn consistency because at times I simply react and that just makes everything worse. I need a plan of action, and you have outlined a plan very well, I appreciate this.

 

I believe it's because he has the zoomies and wants you to come with him.

 

This cracked me up....

 

With all dog training, consistency is one of the most important things. If you are not 100% consistent with your response to something, whether that be rewarding a good behavior or redirecting something you don't want, the dog will only be confused and will not learn what you want them to learn.

 

Totally normal zoomie behavior! 😅 But since he's big, it's important to gently teach him not to mouth your arms. Try redirecting him to a toy when he gets the zoomies. It’s not aggression—just excitement—but setting boundaries now will really help later! 🐶💨

 

All of this was already said in a reply to the OP above.

 

Thank you for the response. He scared me for a minute when he grabbed my arm.

 

Puppy zoomies often happen when the puppy is tired. The pup still has the energy to play, but the brain has left the building. My pups were maniacs during the witching hour, roughly 6 PM to 7:30 PM, after which they usually conked out. It's hard to train a puppy when they get like this, because their brain isn't really working properly.

I used a combination strategy to deal with stupid tired puppy antics. One was to work on manners training at a time of day when the puppy was actually capable of focusing. Another was to put the puppy into his crate with a Kong toy loaded with a favorite snack. Lying in bed while chewing something tasty would usually relax the puppy enough to lull him into sleep. A third was to reset his schedule by taking him to training class in the evening. At first the puppy would be a nut, because class happened during the witching hour. With practice and maturity, however, the pup got used to working and focusing during the time of day when he would previously struggle.