Day one: I took Jasper to Petco. I clicked and treated him when we first approached the store. I then waited for eye contact. This assures that he's comfortable. We moved to inside the store. I clicked, but j wasn't concerned with his reward. We stood there until he felt a little bit more comfortable and I fed him. We clicked and treated for just standing there. We had a lot of distractions which made things harder. A man had a long aquarium bulb he was pointing at us while he was asking questions about Jasper. His kids also tried to approach and shied away multiple times. I was using kibble. Generally a high value treat doesn't seem to change things with him but next time I'll try this.
When rewarding, he was biting down hard, which indicated he was clearly worried. I feel like there was some progress made. He was able to walk a few steps without hunching down too much. After a good four or so minutes, we left. That's all we planned to do this morning. We will try again tomorrow.