1) Chicken farmers own and provide equipment that (2) the parent company requires and has set standards.
3) The contractee chooses farmers based on some criteria(not certain, but I would assume it's fairly extensive).
4) Contractee sets prices; the farmers do compete with each other for the best pay based on quality, but the farmers do not set prices. Chicken quality could be seen as equivalent to Uber's pay based on hours/distance driven.
5)Chicken farmers do possess skills that influence Tyson's profit or loss, so this point differs.
6)I'm very much doubt that the farmers can subcontract.
7) The chicken farmers are vital to the contractee's business; the profit of Tyson and other companies that use poultry contracts depends primarily on the supply and quality of the chickens raised by the contracted farmers.
Overall, Uber drivers and contracted chicken farmers seem fairly similar though the chicken farmers may conform slightly more to the traditional contractor role.