I used to live in the northern part of Lancaster County. You got used to the smell of manure & only really noticed it when it was freshly spread (like during the late winter/early spring when they were getting ready to turn the soil. The thing that I really never got used to were the flies.
Farmers have always done that. With liquid manure the smell is really bad, but hey, don’t move next to a farm if you don’t want to smell the ‘country coffee.’