Is this worth a vet visit?

My Golden Retriever puppy (4 month old) has been getting constant itches. This is my first time having a dog and I tried to investigate on my own what it could be. I think the itch began when I changed his diet from Blue Buffalo puppy, chicken and brown rice based food to normal Purina chicken and rice. At the same time I moved to an apartment and the grass surrounding has pesticide but before I knew that I walked out my dog a lot on that grass, now I do shorter walks and try to expose him as little as possible to the grass around. I think the itch went down a little but maybe y'all can help me out a and guide me a little bit. Thank you.

u/FaithOnMyBeing — 2 months ago