Start Farm sucks as insurance, had them for years, dropped them, because they suck. They will shaft you every chance they get, they suck.
With that being said.
It's the liability thing. NO homeowners insurance is going to cover any business activities in your home, you will need a separate policy for that. Now if it's something like, I buy candy canes in 100 lb bags and resell them in 1 lb bags, they might let you take an umbrella policy to cover it, but poultry, is a huge other world.
Salmonella, Botulism, Lysteria, YOUR chicken had the avian flu and wiped out my flock of 500k chickens, YOU didn't disclose now Im suing you..... THAT kind of thing. Then there is always the dirt bag who wants to make your business, their business. claims they got sick off one of your birds, now is suing and wants your house, property, everything. How do you protect yourself from that type of reach? If you are running it out of your house, it's VERY hard to protect yourself, even if they just sued the business,.. the 'business' is still.. your house.
You are also going to have to pass all sorts of sanitary laws too, being it's food, and poultry involved. They could say you need bonded processing equipment, bonded refrigeration, etc etc. Again this is to protect the people from some clown selling bad birds out of the back of their shed.
Even if someone does not sue you, if one of your neighbors snitches you out to the health department, that you are selling unlicensed food... good luck with that.
Aaron