Collagen Slices Original Bully Flavor Treat
Verified Jun 20, 2026
This is a high-protein, slow-cooked collagen chew treat for dogs, made primarily from beef hide collagen with added beef liver, beef pizzle, and egg whites. It’s coated in a flavorful “bully gravy” and includes chicken cartilage, salmon oil, and small amounts of fruit and vitamins to provide extra nutrients. This treat is designed mainly for chewing enjoyment and dental wear, not as a complete diet, and should be given in moderation.
Nutritionally, this is a high-protein, relatively low-fat chew that can work well as an occasional reward for most healthy dogs who tolerate beef, egg, and chicken. The collagen base plus chicken cartilage may offer some joint-supporting components, and the texture encourages chewing, which can help mechanically reduce tartar. It’s still a calorie-dense treat at about 59 kcal per slice, so portion control is important, especially for dogs watching their weight.
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At a Glance
KibbleLab Review
Strengths
- Very high protein (minimum 78%) from collagen, beef liver, beef pizzle, and egg whites, which makes it more nutritious than many simple rawhide-style chews.
- Relatively low fat (minimum 1%), which can be helpful for dogs that don’t tolerate rich, fatty treats well.
- Collagen and chicken cartilage provide natural sources of connective-tissue components that may support joint health when used alongside a balanced diet.
- Slow-cooked, firm texture encourages chewing, which can help with dental cleanliness for dogs that chew thoroughly.
Considerations
- Contains multiple common allergens (beef, egg, chicken), so it isn’t suitable for dogs with sensitivities to any of these proteins.
- At about 59 calories per slice, it can add up quickly for small or less active dogs if given too often; treats should generally stay under 10% of daily calories.
- This is a treat, not a complete and balanced food, so it should only be used alongside a nutritionally complete diet.
- Hard chews can pose a risk of tooth damage or choking for aggressive chewers or dogs prone to gulping, so supervision and choosing an appropriate size are important.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Collagen
Collagen is an animal-derived structural protein commonly added to pet foods and supplements as gelatin or hydrolyzed collagen to support joint, skin and coat health and to provide digestible connective-tissue protein for dogs and cats. It supplies key amino acids such as glycine and proline important for cartilage and skin maintenance but is low in tryptophan and not a complete protein—so it should not replace higher-quality muscle proteins—and pet owners should note source quality and potential allergen/contaminant concerns.
02
Beef Liver
Beef liver is an organ meat commonly used in dog and cat foods and treats as a highly palatable, protein-rich, nutrient-dense ingredient that provides concentrated, bioavailable vitamins (especially vitamin A and B12), heme iron, copper, and essential amino acids. While it supports blood health and overall nutrition, beef liver should be fed in moderation because excess vitamin A can cause toxicity, its richness may upset sensitive stomachs or contribute to pancreatitis in predisposed pets, and proper sourcing/processing is important to minimize contaminant or bacterial risks.
03
Egg White
Egg white is a highly digestible, low‑fat, high‑quality protein source in pet foods, supplying concentrated albumin and essential amino acids that support muscle maintenance and growth in dogs and cats. It provides a lean protein alternative to meat but lacks the vitamins and fats of the yolk, can be an allergen for some pets, and raw egg white contains avidin (which can interfere with biotin) and may carry salmonella risk, so cooked or pasteurized forms are preferred.
04
Beef Pizzle
Beef pizzle is a single-ingredient, dried beef chew made from muscle/tendon tissue that serves as a long-lasting, high-protein treat for dogs and a source of collagen and natural animal protein; it helps satisfy chewing instincts and may provide some mechanical abrasion to help reduce tartar. Owners should supervise use because whole or large pieces can pose choking or gastrointestinal blockage risks, very hard chews can risk tooth fracture, and there are considerations around caloric density, potential bacterial contamination if not properly processed, and suitability for pets with allergies or sensitive digestion (generally not intended for cats).
05
Fructose
Fructose is a simple sugar sometimes used in pet treats and palatability enhancers to add sweetness and provide quick energy. It supplies nonessential calories but no protein or vitamins; excessive intake can contribute to obesity, dental disease and gastrointestinal upset and may worsen diabetes, and while cats lack functional sweet taste receptors and do not perceive sweetness, they still metabolize dietary sugars and should also have fructose limited.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Product Details & Brand
Product Specs
Brand
Redbarn is the flagship brand of Redbarn Pet Products, offering natural pet foods, treats, and chews made with simple, wholesome ingredients. The brand targets pet owners seeking high-quality, transparent nutrition options for their pets, focusing on safety, palatability, and nutritional balance.
Visit RedbarnManufacturer
Redbarn maintains its own manufacturing facilities in the United States and Paraguay, utilizing in-house quality assurance programs that include extensive product testing, adherence to FDA and USDA regulations, and HACCP-based food safety procedures. The company’s facilities meet or exceed industry standards for safety and traceability.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Redbarn Collagen Slices Original Bully Flavor Treat has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
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Frequently Asked Questions
Has Redbarn ever been recalled?
We have no recalls on record for Redbarn. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
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