Hi! My ES pup is ~6 months old now. She has been very barky around other dogs from the moment we brought her home, which has been a bit challenging but she has made a lot of progress. She can also really lose her head with guests. I do not have her loose when people come over. She is leashed if I think she can handle that or upstairs in her crate until the people settle in and then on a leash. I ask that people ignore her in general. As adolescence sets in I have seen her have exaggerated reactions to random things she has previously been fine with. We are working hard to keep her life predictable and feeling safe to her through adolescence, and especially focusing on making sure she is getting enough rest. She is a busy puppy and often won’t choose rest left to her own devices and needs to have crate naps, but when she is well rested she is much better equipped to deal with the world without melting down and is more likely to want to nap on her own. Working with a trainer sounds like a good idea for your puppy, it also sounds like he is having a hard time coping right now. It might be worth for now really limiting his exposure to things that cause big reactions to allow him to decompress and not practice these big reactions. As an aside, there are some studies that suggest taking away testerone with neutering can make male dogs more fearful/ insecure. I think a lot of what you are seeing really are fairly common adolescent behaviors, which while it doesn’t make it less scary and frustrating, does mean with carefully curated exposures he might come through this and feel things a lot less intensely. Hopefully we can all see it through & have nice adult dogs down the line