Meat and Bone Meal
Last updated: February 11, 2026
In This Article
Quick Summary
Meat and Bone Meal Generic rendered protein with unknown animal sources. Impossible to identify allergens since species can change batch to batch. High ash content (20-30%) from bone reduces digestibility. Named meals like "chicken meal" provide transparency this ingredient lacks.
What It Is
Rendered product from mammalian tissue including bone. Source animal not specified.
Compare to Similar Ingredients
- vs. chicken meal: Chicken meal is a named animal source with transparency about species. Meat and bone meal is generic mystery meat from unspecified mammals. Named meals are vastly superior for quality and consistency.
- vs. beef meal: Beef meal identifies the specific animal source, while meat and bone meal could be any mammal. Named meals provide transparency and consistency; generic meals signal poor quality and cost-cutting.
- vs. meat by products: Both are vague, low-transparency ingredients. Meat and bone meal is rendered and dried, while meat by-products are fresh but unspecified organs. Both lack transparency; named ingredients are always preferable.
Why It's Used in Pet Food
Manufacturers include meat and bone meal in dog food, treats, and supplements for several reasons:
- Cheap protein source
- Uses rendering byproducts
- Provides calcium from bone
Quality Considerations
When evaluating meat and bone meal in dog products, it's important to understand protein density, amino acid profile, digestibility, and sourcing quality. This ingredient's quality and appropriateness can vary significantly based on sourcing, processing, and the specific formula it's used in.
Very low transparency—could be any mammal. High ash content from bone. Quality highly variable.
Potential Concerns
While meat and bone meal provides concentrated protein, pet owners should be aware that: (1) this is a generic term that doesn't specify animal source, which could be any mammal except dog or cat, making quality and allergen identification difficult, (2) the rendering process can significantly affect nutrient quality and digestibility, (3) bone content may reduce digestibility and provide lower quality protein than muscle meat, and (4) "meat" in this context can include tissues that wouldn't be considered meat in human food, including rendered scraps. Individual dogs may respond differently to the same ingredient based on their health status, age, and sensitivities.
Scientific Evidence
Meat and bone meal is a rendered product from mammalian tissues, including bone, that has been processed to remove moisture and fat. According to AAFCO definitions, it cannot contain added blood, hair, hoof, horn, hide trimmings, manure, or stomach contents except in trace amounts unavoidable in good processing. The product typically contains 50-55% crude protein and 10-12% calcium due to the bone content. The rendering process involves cooking tissues at high temperatures (typically 115-145°C) to kill pathogens and remove moisture, which can reduce the digestibility of some amino acids through heat damage. Protein digestibility varies significantly based on source materials and processing conditions, with coefficients generally ranging from 75-85%. The high ash content (20-30%) reflects the bone mineral content, providing calcium and phosphorus but also reducing the percentage of digestible protein per unit weight. The amino acid profile is generally complete but can vary based on the tissue sources used. The ingredient lacks species specification, meaning it could come from any combination of mammalian sources, which raises concerns about consistency and traceability. Quality control is critical as rendering processes and source materials can vary substantially between suppliers.
Key Research Findings
- Protein content typically 50-55% with 20-30% ash from bone content
- Protein digestibility coefficients generally 75-85%, varying by processing
- High-temperature rendering can reduce amino acid bioavailability through heat damage
- Provides concentrated calcium and phosphorus from bone fraction
Evidence Level: Moderate - based on ingredient standards, rendering process research, and feeding studies, though ingredient variability makes generalization difficult
Manufacturing & Real-World Usage
Rendering Process and Source Variability
Meat and bone meal comes from rendering facilities that process mammalian tissues deemed unfit for human consumption. The process involves cooking animal tissues at high temperatures, typically 115 to 145 degrees Celsius, to kill pathogens and remove moisture and fat. What's left gets dried and ground into a protein-rich meal. The catch is that "meat and bone meal" doesn't specify which animals went into the batch - it could be cattle, pigs, sheep, or a mixture of whatever was available that day.
This lack of species identification creates real quality control challenges. One batch might be primarily beef with consistent amino acid profiles, while the next batch could be mostly pork with different characteristics. For manufacturers working with meat and bone meal, this variability means they're essentially formulating with a moving target. Reputable renderers provide certificates of analysis for each batch, but the product still lacks the consistency you get with named meals like chicken meal or beef meal where the source is controlled.
Cost Economics and Typical Usage
The main reason meat and bone meal exists is economics. It costs about $0.80 to $2.50 per kilogram depending on protein content and market conditions, making it one of the cheapest protein sources available. Compare this to chicken meal at $1.50 to $3.50 per kilogram or beef meal at $2.50 to $5.00 per kilogram, and you can see why budget brands gravitate toward it. The cost savings come from using whatever rendering material is available rather than committing to a specific animal source.
In practical formulation, meat and bone meal typically shows up at 15 to 35 percent of the formula in budget dry foods where it serves as the primary protein source. The protein content usually runs about 50 to 55 percent with ash content around 20 to 30 percent from the bone fraction. That high ash content means you're getting less actual protein per unit weight compared to lower-ash meals, so formulators have to account for this when calculating protein contributions. The bone content does provide calcium and phosphorus, which can be helpful for balancing minerals, but it also means you're paying for mineral weight in what's supposed to be a protein ingredient.
Quality Concerns and Regulatory Oversight
AAFCO definition for meat and bone meal specifies it can't contain added blood, hair, hoof, horn, hide trimmings, manure, or stomach contents except in trace amounts unavoidable during processing. That's the floor, not the ceiling. Quality varies tremendously based on what rendering facilities accept and how careful they are about contamination. Some facilities maintain strict standards and test for heavy metals, bacterial contamination, and consistent nutrient profiles. Others are less rigorous, and you get what you pay for.
The digestibility of meat and bone meal typically ranges from 75 to 85 percent, which is acceptable but not stellar compared to whole meat or premium meals. The high-temperature rendering process can damage heat-sensitive amino acids like lysine and reduce overall protein quality. This is why you'll see better brands avoid generic meat and bone meal in favor of named sources that offer more transparency and consistency. For dogs with food sensitivities or allergies, meat and bone meal is basically impossible to work with because you can't identify the protein source for elimination diets. That lack of traceability is perhaps the biggest practical limitation beyond quality variability and digestibility concerns.
How to Spot on Labels
Reading ingredient labels can be confusing. Here's how to identify and evaluate this ingredient:
What to Look For
- Listed as 'meat and bone meal' without species specification
- Generic designation indicates mixed or unspecified mammalian sources
- Common in budget and economy dog food formulas
- Compare to species-specific alternatives like 'chicken meal' or 'beef meal'
Alternative Names
This ingredient may also appear as:
- Meat meal and bone meal
- Meat-bone meal
Red Flags
- No species identification (could be any mammalian source)
- Listed as primary protein source in formula
- Lack of transparency about sourcing or quality controls
- Presence in foods claiming 'premium' or 'quality' positioning
Green Flags
- None - this ingredient inherently lacks transparency due to unspecified sources
- Consider choosing products with named protein sources instead (chicken meal, beef meal, etc.)
Typical Position: First 1-5 ingredients in budget dog foods. Absence from ingredient list is generally preferable in favor of species-specific protein meals.
## Scientific Evidence ### Protein and Nutrient Profile Meat and bone meal (MBM) contains approximately 45-55% protein and 8-15% fat on a dry matter basis, with significant mineral content (18-25% ash) due to included bone material. As a rendered product from mammalian tissues, it provides concentrated protein and minerals, particularly calcium and phosphorus. The unspecified animal source(s) create nutritional variability. ### Amino Acid Composition **Essential Amino Acids (per 100g protein - approximate, varies by source):** - Leucine: 6.5-7.5g - Lysine: 6.0-7.2g - Isoleucine: 3.8-4.6g - Valine: 4.5-5.3g - Threonine: 3.8-4.5g - Methionine + Cysteine: 2.5-3.5g - Tryptophan: 0.6-1.0g Amino acid profile varies significantly depending on animal source(s), tissue types included, and bone-to-meat ratio. Generally provides complete but variable essential amino acid profile. Higher bone content dilutes protein quality and reduces some amino acid concentrations. ### Digestibility and Bioavailability Protein digestibility ranges from 75-85%, lower than single-source meals (chicken meal, beef meal) due to: - Variable source materials - Higher bone and connective tissue content - Inconsistent processing conditions - Mixture of different tissue types Biological value is approximately 70-80, acceptable but not optimal. Digestibility can vary significantly between batches due to inconsistent source materials. ### Mineral Content and Concerns **High Mineral Load:** - Calcium: 8-12% (very high due to bone content) - Phosphorus: 4-6% - High ash content (18-25%) indicates significant mineral load The high calcium and phosphorus levels require careful formulation balancing, particularly for growing large-breed puppies where excess can cause skeletal problems. The calcium:phosphorus ratio is generally acceptable (1.5:1 to 2:1) but the absolute levels can be problematic. ### Quality and Safety Considerations **Significant Variability:** Unlike named-source meals (chicken meal, lamb meal), MBM can include: - Multiple animal species mixed together - Variable tissue types (muscle, organs, bone, connective tissue) - Different quality grades of source material - Batch-to-batch inconsistency **Potential Issues:** - Unknown allergen sources (can't identify for elimination diets) - Variable protein quality - Inconsistent digestibility - May include diseased or dying animals in some regions (varies by regulation) ### Evidence Quality Rating **Rating: C+ (Adequate evidence but significant concerns)** - Well-established as protein source but with limitations - High variability between products and batches - Acceptable digestibility but inconsistent - Nutritional adequacy depends heavily on source quality - Lack of traceability is significant limitation ## Label Guidance ### Alternative Names and Variations - "Meat and Bone Meal" - "Meat & Bone Meal" - "MBM" - Sometimes appears as "Animal Meal" (even less specific) - May be combined with species: "Beef and Bone Meal" (if specified, better) ### Typical Positioning on Labels Can appear in first half of ingredient lists in budget formulas as primary protein source, or in middle sections of mid-tier foods as supplemental protein. More common in lower-cost products. Position indicates significant protein contribution but with quality concerns. ### Quality Indicators **Limited Positive Signs:** - Species specified ("beef and bone meal" vs generic "meat and bone meal") - Lower positioning (supplemental rather than primary protein) - In formulas with other quality protein sources - Rendering certifications mentioned - Country of origin specified **Quality Concerns:** - Generic "meat and bone meal" provides no source transparency - Difficult to assess quality without knowing source - No allergen identification possible ### Red Flags - First or second ingredient (primary protein from unknown sources) - Generic "meat and bone meal" without species - Multiple generic meals (meat meal, meat and bone meal, animal meal) - No quality certifications or processing standards - In premium-priced foods (doesn't match quality positioning) - For pets with food sensitivities (unknown allergens) - No sourcing information whatsoever ### Green Flags (Rare for this ingredient) - Species specified (e.g., "chicken and bone meal" - though usually called "chicken meal") - Lower in ingredient list (supplemental use) - Combined with named protein sources - Country of origin stated - Quality rendering certifications - Note: Few premium brands use generic meat and bone meal ### Common Misconceptions - **"Same as named meals like chicken meal"**: Much less traceable and consistent than species-specific meals - **"By-product automatically means low quality"**: MBM isn't technically by-product, but quality varies widely - **"Bone content makes it better"**: Excessive bone increases minerals and reduces protein quality - **"All meat and bone meals are equal"**: Quality varies dramatically based on source material ### What to Look For **Transparency Concerns:** Generic "meat and bone meal" lacks species identification, making it unsuitable for: - Elimination diets or allergy management - Novel protein protocols - Consumers seeking ingredient transparency **Better Alternatives Exist:** - Named meals: chicken meal, beef meal, lamb meal (traceable sources) - Whole meats: chicken, beef, fish (identifiable) - Single-species by-products with named sources **When Acceptable:** Only in budget-conscious formulas where: - Pet has no known food sensitivities - Used as supplemental protein (not primary source) - Combined with other named proteins - Price is primary consideration **Recommendation:** Prefer foods with named protein sources (chicken meal, beef, salmon) over generic meat and bone meal for quality, consistency, and allergen management. If present, should be lower in ingredient list and combined with identified protein sources.We avoid generic meat meals. No way to know source or quality. Named animal meals only.
Frequently Asked Questions
Why do premium dog food brands avoid meat and bone meal?
The main issue is transparency—'meat and bone meal' doesn't specify which animal it comes from. It could be beef, pork, lamb, or a mixture that changes batch to batch. This makes it impossible to identify allergens, maintain consistent nutrition, or trace quality issues back to their source. Premium brands prefer named ingredients like 'chicken meal' or 'beef meal' because they know exactly what they're getting and can guarantee consistency.
What animals are actually in meat and bone meal?
By AAFCO definition, meat and bone meal can contain any mammals except dogs and cats. In practice, it's typically cattle, pigs, sheep, or a combination depending on what's available at the rendering facility. The composition can change between batches based on supply. This variability is why it's unsuitable for dogs with food allergies—you simply can't know which proteins are present.
Is meat and bone meal dangerous for dogs?
It's not immediately dangerous—AAFCO regulates it and rendering kills pathogens. However, the lower digestibility (75-85% vs 85-92% for named meals), unknown sources, and high ash content (20-30% from bone) make it a lower-quality protein choice. The bigger concern is what it signals about the formula: brands using generic meat and bone meal as a primary protein are typically prioritizing cost over quality throughout their formulation.
Related Reading
Learn more: What is Meat Meal in Dog Food? Complete Guide · Chicken By-Products in Dog Food: What Are They?
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