What Bone Broth Actually Contains
Bone broth is produced by simmering bones (with or without connective tissue, cartilage, and marrow) in water for extended periods (12-48 hours), typically with a small amount of acid (apple cider vinegar) to aid mineral extraction.
The resulting liquid contains:
- Gelatin/collagen: the primary protein component. Gelatin is denatured collagen that dissolves into the broth from bones and connective tissue.
- Glycine and proline: the two dominant amino acids in collagen/gelatin. Glycine has documented anti-inflammatory and neuroprotective properties.
- Minerals: calcium, magnesium, phosphorus, potassium. However, a 2017 analysis of commercial and homemade bone broths found mineral concentrations were surprisingly low — far less than commonly claimed. Bone broth is not a reliable mineral supplement.
- Glucosamine and chondroitin: present in small, variable amounts when broth includes cartilage and joints. Concentrations are typically lower than therapeutic supplement doses.
- Fat: variable depending on preparation (skimming reduces fat content).
Where Bone Broth Has Genuine Value
Appetite Stimulation and Hydration
The single best use case for bone broth in dogs. For dogs that are:
- Recovering from surgery or illness with reduced appetite
- Dehydrated and reluctant to drink water
- Elderly with declining interest in food
- Transitioning to a new diet
Warming bone broth and pouring it over food increases palatability and provides hydration simultaneously. This is a practical, low-risk intervention.
Post-Surgical Recovery and GI Support
The glycine in bone broth has documented anti-inflammatory effects. A 2003 review in Current Opinion in Clinical Nutrition and Metabolic Care summarized evidence that glycine protects against inflammatory injury in the gut, liver, and kidney. For dogs recovering from GI surgery or acute gastroenteritis, bone broth as a transitional food provides easily digestible protein and fluid.
Gentle Nutrition for Inappetent Dogs
When a dog will not eat solid food, bone broth provides some calories, protein, and hydration. It is not nutritionally complete and cannot replace a balanced diet long-term, but as a short-term support measure during illness or recovery, it serves a useful role.
Where Bone Broth Is Overhyped
Joint Health
The claim: bone broth provides glucosamine, chondroitin, and collagen that support joint health and treat arthritis.
The reality: the concentrations of these compounds in bone broth are far below therapeutic doses used in clinical studies. Therapeutic glucosamine dosing for dogs is 20 mg/kg/day. You would need to feed liters of bone broth daily to approach this dose. For joint support, use standardized supplements at known doses rather than relying on broth.
Mineral Supplementation
As noted above, laboratory analysis shows bone broth contains less calcium and magnesium than commonly claimed. It is not a substitute for proper mineral supplementation in homemade diets.
”Leaky Gut” Treatment
Bone broth is widely promoted as a treatment for intestinal permeability (“leaky gut”). While the gelatin and glycine content may support gut lining integrity, no controlled canine studies have demonstrated that bone broth specifically repairs increased intestinal permeability. Colostrum and probiotics have better evidence for this application.
How to Prepare Safely
Homemade bone broth for dogs:
- Use raw or cooked bones (beef, chicken, turkey). Avoid cooked chicken bones in other contexts, but simmered in broth they soften completely.
- Cover with water and add 1-2 tablespoons of apple cider vinegar per quart.
- Simmer on low heat for 12-24 hours (slow cooker works well).
- Strain thoroughly — remove all bone fragments.
- Skim fat from the surface after cooling.
- Store in the refrigerator for up to 5 days, or freeze in portions for longer storage.
What to avoid:
- Onions and garlic (toxic to dogs in significant amounts)
- Added salt (unnecessary and potentially harmful)
- Bones that have been seasoned with spices
- Store-bought broth formulated for humans (often contains onion, garlic, and excessive sodium)
Feeding Amounts
- Small dogs: 1-2 oz (30-60 mL) per day
- Medium dogs: 2-4 oz (60-120 mL) per day
- Large dogs: 4-8 oz (120-240 mL) per day
Use as a food topper, mix with dry food, or offer as a standalone snack. Adjust base food portions to account for broth calories (approximately 30-45 kcal per cup).
See also: collagen peptides for dogs, post-surgery nutrition, bone broth for dogs.
Frequently Asked Questions
How long can homemade bone broth be stored safely?
Refrigerated bone broth keeps for up to 5 days. For longer storage, freeze in ice cube trays or small containers for up to 6 months. The layer of fat that solidifies on top when refrigerated acts as a natural seal — remove it before serving if your dog is on a calorie-restricted diet, or for dogs with pancreatitis history.
Can bone broth replace glucosamine supplements for joint health?
No. The glucosamine and chondroitin concentrations in bone broth are far below therapeutic doses. Therapeutic glucosamine dosing for dogs is approximately 20 mg/kg/day, and you would need to feed liters of broth daily to approach this amount. For joint support, use standardized glucosamine-chondroitin supplements at known doses.
Is store-bought bone broth safe for dogs?
Most bone broths sold for human consumption contain onion, garlic, and excessive sodium — all of which should be avoided for dogs. If purchasing commercial broth, choose products specifically formulated for pets, or plain, low-sodium bone broth with no added seasonings. Always check the ingredient list.
Can puppies have bone broth?
Yes, in moderation. Bone broth can be a useful appetite stimulant for puppies transitioning to solid food or recovering from mild GI upset. Keep portions small (1-2 oz for puppies) and ensure the broth is plain, unseasoned, and fat-skimmed. It should not replace balanced puppy food.
Related Science
- Supplement Evidence for Dog Longevity: What Is Strong, Weak, or Hype
- Arthritis Pain Stack for Dogs: Mobility-First Framework
- Canine Size and Lifespan Biology: What Actually Drives the Gap
- Cold Water Swimming and Recovery for Dogs: Evidence and Protocol
- Elbow Dysplasia in Dogs: Lifetime Load Management
References
- Hsu DJ, et al. “Nutrient composition of bone broth prepared from different animal sources.” Journal of Renal Nutrition, 2017.
- Zhong Z, et al. “Glycine: a novel anti-inflammatory, immunomodulatory, and cytoprotective agent.” Current Opinion in Clinical Nutrition and Metabolic Care, 2003.
- Moskowitz RW. “Role of collagen hydrolysate in bone and joint disease.” Current Medical Research and Opinion, 2006.