Poultry by-product meal is a dry, brown powder made from ground and cooked parts of slaughtered poultry that aren’t typically sold as human food. It shows up on pet food ingredient lists frequently and contains between 52% and 70% protein by weight, making it one of the more protein-dense ingredients available to pet food manufacturers. Despite its unappetizing name, it’s a defined, regulated ingredient with a specific composition.
What’s Actually in It
The Association of American Feed Control Officials (AAFCO) defines poultry by-product meal as the ground, rendered, clean parts of slaughtered poultry carcasses. That includes necks, feet, undeveloped eggs, intestines, and other internal organs. Feathers are explicitly excluded, except in trace amounts that are unavoidable during processing. If the label names a specific bird, like “chicken by-product meal,” the ingredient must come from that species.
The protein content across different batches typically ranges from about 52% to 70%, fat ranges from roughly 14% to 25%, and mineral content (ash) falls between about 8% and 18%. That variability exists because the exact mix of organs, necks, and feet changes from batch to batch. A batch heavy on organs will have a different nutritional profile than one heavy on feet, which contain more bone and therefore more minerals.
The amino acid profile is genuinely useful for dogs and cats. On a dry matter basis, poultry by-product meal averages about 3.8% lysine and 1.0% methionine, both essential amino acids that animals can’t produce on their own. Lysine supports muscle maintenance and immune function, while methionine plays a role in skin and coat health.
How It Differs From Poultry Meal
The names sound almost identical, but the distinction matters. Poultry meal (sometimes labeled as chicken meal or turkey meal) is the dry rendered product of clean flesh and skin only. Poultry by-product meal includes organs, feet, necks, and undeveloped eggs in addition to any flesh and skin. In practical terms, poultry meal is closer to what you’d think of as “meat,” while poultry by-product meal includes the offal.
Interestingly, the pet food industry tends to favor poultry by-product meal definitions because they’re more precise. The AAFCO definition for mammal-based “meat meal” has mineral ratio requirements and digestibility thresholds that can be tricky to meet consistently. Poultry by-product meal’s definition is more straightforward, which means less room for error in formulation. One industry analysis noted that poultry by-product meal definitions are essentially “goof proof” compared to their mammal-based counterparts.
How It’s Made
The production process is called rendering. Raw poultry parts are collected from slaughterhouses and cooked at high temperatures, typically starting around 100°C and sometimes reaching 140°C or higher under pressure. This breaks down the raw tissue, kills bacteria, and drives off moisture. The resulting material is then pressed to separate fat from the protein-rich solids, dried further, and ground into a uniform powder.
The high heat serves two purposes: it concentrates the protein by removing water (raw poultry parts are mostly water, while the finished meal contains very little), and it destroys pathogens like Salmonella. Temperatures above 80°C during processing are standard for pathogen control, with studies showing a 3- to 4-log reduction in bacteria, meaning 99.9% to 99.99% of organisms are eliminated. After rendering, manufacturers often add preservatives to prevent the fat in the meal from going rancid during storage.
Why Pet Food Companies Use It
Cost is the obvious reason, but it’s not the only one. Poultry by-product meal delivers a concentrated source of animal protein at a lower price point than whole meat or poultry meal. Because the water has been removed, a smaller amount of by-product meal delivers more protein per pound than fresh chicken, which is roughly 70% water. When you see “chicken” listed as the first ingredient in a pet food, it may actually contribute less total protein than poultry by-product meal listed second or third, simply because of the water weight difference.
Organ meats also bring nutritional value that pure muscle meat doesn’t. Liver, for example, is rich in certain vitamins and minerals. The inclusion of varied tissue types can create a broader nutrient profile than muscle meat alone, though the tradeoff is less consistency between production runs.
The Environmental Angle
Rendering is one of the largest recycling operations most people have never heard of. In the United States and Canada, the rendering industry processes roughly 62 billion pounds of raw animal materials annually, turning them into about 31.4 billion pounds of usable fat, oil, and protein products. Without this system, those materials would need to be disposed of some other way.
The environmental math is striking. If all renderable animal by-products were sent to landfills instead of being processed, available landfill space in the U.S. would fill up in approximately four years. An average rendering plant sequesters about five times more greenhouse gases than it produces, and the industry overall avoids at least 90% of the potential emissions compared to industrial composting. That’s the equivalent of removing 18.5 million cars from the road each year. Using by-product meal in pet food is, in effect, a form of recycling that keeps enormous volumes of organic waste out of the waste stream.
Quality Varies Between Brands
Not all poultry by-product meal is created equal. The wide ranges in protein (52% to 70%) and mineral content (8% to 18%) reflect real differences in source material and processing. A higher ash percentage generally means more bone was included, which increases calcium but dilutes the protein concentration. Premium pet food manufacturers typically specify tighter composition standards from their suppliers, selecting for higher protein and lower ash.
Processing temperature and duration also affect quality. Gentler drying preserves more of the amino acids in their digestible form, while aggressive high-heat drying can damage proteins and reduce how much nutrition your pet actually absorbs. Some manufacturers use shorter, higher-temperature flash drying followed by a lower-temperature finishing step, which appears to better preserve digestibility compared to prolonged high-heat methods.
The ingredient itself isn’t inherently good or bad. A well-sourced, carefully processed poultry by-product meal can be a highly digestible protein source. A poorly processed one with excessive bone content and heat-damaged proteins delivers less usable nutrition despite looking identical on the label. The challenge for pet owners is that the ingredient name tells you nothing about which version ended up in the bag.