As the study highlighted, compared to 50 years ago, chickens and turkeys are now growing to 6 pounds in half the time that was needed before and are sold at twice their body weight. This was apparent in chickens being placed on high-energy diets which are often rich in supplemental poultry oil, an unsaturated animal fat. Many of these practices came about to fill the demand placed on poultry in recent years, with breast meat becoming especially popular in Europe and North America. Unfortunately, these practices might have lead to a muscle disorder in the birds, causing muscles to decrease as fat increased as seen on chicken breasts with white stripes.
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