Anyone have experience helping a pup not be scared of loud noises outside? It’s getting worse.

My pup is 6mos old and 6lbs with giant candle flame ears, which I am sure amplify everything.

For the weeks before he could go on the ground due to vaccinations I used to put him in the Snuggie and walk around my neighborhood so that he would get used to the sites and sounds of outside with lots of treats.

Then we started leash walking, he always was a little intimidated by the outdoors, but he was getting used to it, with lots of treats and praise. He always struggled with loud engines, motorcycles, sirens, landscapers, etc., which unfortunately are very common in my city area. When I would see something coming that I knew was going to be jarring to him, I would give a high value treat so that he would associate loud sounds with Something positive. It it is working pretty well when he hears something loud. A lot of the times he will look up at me for a treat and remain still instead of having a complete fear reaction where he tries to get out of his harness, etc.

Then there were a couple of incidents with garbage trucks, I had to hold him because he was thrashing wildly and we couldn’t get away in any directions so he was exposed a couple times to this pretty terrifying situation, that I did my best to navigate. He doesn’t really wanna go outside anymore, I have trouble getting him out of the elevator. He doesn’t wanna walk down the front steps. I know I shouldn’t be luring him with food because that just enforces the behavior. Often I pick him up and carry him to the back of my block, and then he will walk home. (He will walk towards home, but not away- we also practice walking at the park, etc)

But I don’t want him to feel this scared in the world, and I would like to help him understand that these noises aren’t scary without reinforcing fear behavior through treats, which is what I’m afraid I have started to do by accident.

We’ve been working with YouTube videos of garbage trucks inside, but they do not really replicate the real thing. It’s gotten to the point now on garbage day, which is several days a week, he’s now afraid inside my apartment and just listens for them and runs around trying to hide. It’s pretty bad and I’m wondering if anyone has had any experience training a dog that big sounds are fine. I am consulting a trainer in two weeks. I also know that they go through different fear periods and maybe this is just that, I hope but I want to do everything right to set him up For an anxiety, free, happy life right in the beginning. So if you have been in this situation and found anything that really works please let me know. Thanks in advance.