Are my dogs changes unique, or does neuter/spay-ing effect all dogs this way?

Oh my sounds like you don't have enough time for them and they are showing it in their actions. Do they all have the same trainer? Could this person be using techniques that are causing them to act this way. You have some issues here. Something is going on with your dogs. I have 4 dogs in our home that have different personalities and they pout and act out sometimes just like children but I give them so much attention. My dogs that have been spayed gained weight, and don't seem as active so I have to take them for walks to prevent too much weight gain. They love playing ball and running in our backyard of course it is fenced in. Do your dogs get love and tenderness or just training? Maybe they are bonded with the trainer? I don't totally understand the "Show" training tech. but I read your question and wonder why so many dogs and getting more when you have dogs that need attention. I am not being ugly just trying to help. I would own hundreds if I had the money and time to devote to every one of them and I have to restrain myself from getting more if I see one at the pound or one that needs a home. kind of an odd situation?