Hi Lainey,
What a mess! It sounds to me like your neighbor's property met Tyson's setback requirements until they sold your piece, and they didn't think about the setback distance until it was too late.
If it were me, I would not move my chickens until I had exhausted all the other possibilities. First, read your deed very carefully. Does it say that you cannot keep chickens? Are there any zoning restrictions against keeping chickens (unlikely given the agricultual setting, but best to check)? Is there any other legal paperwork anywhere that says you can't have chickens (might be hidden in the fine print)? If you bought the property from your neighbors and they never disclosed a restriction on keeping chickens prior to the sale, it is probably too bad for them. The time for them to put a chicken restriction on your land was BEFORE the sale. So the first thing you have to do is make sure they didn't sneak in a legal restriction that you didn't know about. Then you will have a better idea of where you stand legally.
It would be a good idea to consult with an attorney as soon as possible. Not sure where you are located, but many states have free or income-indexed legal services available. Provided there is no fine print prohibiting chickens on your property, a letter from your lawyer might get the neighbors off your back.
On the other hand, if you want to remain on good terms with them even if they have no legal basis for asking you to move your chickens, you could work with them to find a mutually acceptable alternative. Maybe they could pay to run water and electricity to a new coop that meets their setback requirements (and help pay for or build the new coop, too). Or they could help you get accepted as a Tyson supplier, so you're both meeting the same biosecurity requirements. You could always offer to help them move their chickens farther away from your property
What a mess! It sounds to me like your neighbor's property met Tyson's setback requirements until they sold your piece, and they didn't think about the setback distance until it was too late.
If it were me, I would not move my chickens until I had exhausted all the other possibilities. First, read your deed very carefully. Does it say that you cannot keep chickens? Are there any zoning restrictions against keeping chickens (unlikely given the agricultual setting, but best to check)? Is there any other legal paperwork anywhere that says you can't have chickens (might be hidden in the fine print)? If you bought the property from your neighbors and they never disclosed a restriction on keeping chickens prior to the sale, it is probably too bad for them. The time for them to put a chicken restriction on your land was BEFORE the sale. So the first thing you have to do is make sure they didn't sneak in a legal restriction that you didn't know about. Then you will have a better idea of where you stand legally.
It would be a good idea to consult with an attorney as soon as possible. Not sure where you are located, but many states have free or income-indexed legal services available. Provided there is no fine print prohibiting chickens on your property, a letter from your lawyer might get the neighbors off your back.
On the other hand, if you want to remain on good terms with them even if they have no legal basis for asking you to move your chickens, you could work with them to find a mutually acceptable alternative. Maybe they could pay to run water and electricity to a new coop that meets their setback requirements (and help pay for or build the new coop, too). Or they could help you get accepted as a Tyson supplier, so you're both meeting the same biosecurity requirements. You could always offer to help them move their chickens farther away from your property

I bought my home in sept 2010
I was never told I could not have chickens, this home was part of a very large farm forty acres behind my house, 40 acres across the street, where the chicken barns are.
The land that came with the house was used to raise cattle, the gentleman got sick and could no longer farm it. When we bought the place they knew I would be bringing my horse farm with me
I have 21 horses, 6 dogs, 3 rescue cats, I went as far as talking to the old owners about raising cattle here, nothing was ever said about no chickens.
Perhaps they are worried about losing money if my chickens get sick idk but what I do know is this, it would really ruin my day if I caused someone to lose there family income. They are so worried that they offered to pay me for all the money I had invested into my chicks
I am so dang stumped, I have no clue what to do!