Poultry will not encapsulate a microchip. There is a chance it will migrate to any part of the body. The ratite growers were micro chipping to prevent theft when the market was at its peak. At slaughter if the inspector didn't find the chip at the injection site the whole carcass was condemned and thrown out. When APHIS was working on poultry identification microchips were not considered because they said any poultry had to be treated as possibly entering the food chain.