So we've been raising and butchering meat birds for too many years to count, besides I only have 8 fingers and two thumbs to count years.
We butchered our chicken 3 days ago and they've been resting in a commercial fridge all that time. Today, we decided to break apart the chicken and debone the carcass. One bird as I was cutting up was fine, remove the wings, cut apart the wing and the drumetts, cut the leg and thigh off then cut apart the drum stick and thigh. All's going well then I went to remove the breast meat. As I was cutting down next to the keel bone, breast tenders had a grainy texture and had a noticeable yellow green color to it.
OH MY!!! YELLOW GREEN TINGED BREAST MEAT.
Well if this happens to you don't scream and run away. It's called Green Muscle Disease. (It's not bacterial, fungal or viral disease). Its not an infection at all. Well, the breast tender died or severely injured before butchering. more detail here. https://extension.umd.edu/sites/ext...ams/poultry/IS1976 Deep Pectoral Myopathy.pdf
So the thigh, drum stick, wings, drumettes neck meat are all fine. Even the big part of the breast meat is okay. Tender is the only muscle that was affected so cook it up and we'll feed it to our dogs or cats.

OH MY!!! YELLOW GREEN TINGED BREAST MEAT.
Well if this happens to you don't scream and run away. It's called Green Muscle Disease. (It's not bacterial, fungal or viral disease). Its not an infection at all. Well, the breast tender died or severely injured before butchering. more detail here. https://extension.umd.edu/sites/ext...ams/poultry/IS1976 Deep Pectoral Myopathy.pdf
So the thigh, drum stick, wings, drumettes neck meat are all fine. Even the big part of the breast meat is okay. Tender is the only muscle that was affected so cook it up and we'll feed it to our dogs or cats.