Reviewed by Natural Farm Pet Team · Updated June 2026
TL;DR: Freeze-Dried Bully Sticks
Freeze-dried bully sticks are single-ingredient beef pizzle preserved through sublimation (no heat), which keeps proteins, enzymes, and vitamins intact. The trade-off is texture: the process makes them soft and porous, so most medium-to-strong chewers finish one quickly. That makes freeze-dried best for puppies, seniors, and dogs with dental sensitivity. If you want nutrient preservation and a longer chew, dehydrated and Cold-Dried™ sticks are firmer alternatives. All are 100% natural, single ingredient, and fully digestible.
If you're shopping for freeze-dried bully sticks, you're already making a smart choice. You want a natural chew that preserves nutrients without the chemical processing of rawhide, and freeze-drying does exactly that. This guide covers how they're made, what to expect, who they suit best, and how they stack up against the other ways a bully stick can be dried.
There's one thing most brands won't tell you up front: freeze-dried bully sticks are soft. The same process that preserves nutrients creates a porous, lightweight texture, so most medium and strong chewers get through one fast. That isn't a flaw, it's a fit question. For some dogs the softness is exactly right. For others, a firmer stick is the better buy.
Below, we walk through how freeze-drying works, why it creates that softness, who it's ideal for, and what your firmer alternatives are if durability matters more than a soft texture.
📖 This is a deep-dive within our Complete bully sticks hub. Related reads: Best bully sticks by chewer type · Which chews last the longest?
Key Takeaways
- Freeze-drying uses sublimation (no heat) to preserve nutrients, but creates a soft, porous texture that most dogs chew through quickly
- Freeze-dried is best for puppies, seniors, light chewers, and dogs with dental sensitivity
- Standard dehydration uses low heat (135-165°F): firmer texture, but partial nutrient loss
- Cold-Dried™ is a third method (proprietary low-temperature drying) that preserves up to 97% protein while creating a dense, longer-lasting chew. It's best for medium-strong chewers
- All three are 100% natural and single ingredient: just grass-fed beef pizzle, no additives
- The right method depends on your dog's age, teeth, and chewing strength, not on marketing
📖 In This Guide:
What Are Freeze-Dried Bully Sticks?
Freeze-dried bully sticks are made from beef pizzle that has been preserved through a process called lyophilization. The beef is first frozen to extremely low temperatures, then placed in a vacuum chamber where the frozen water sublimates directly from ice to vapor, skipping the liquid phase entirely.
Because no heat is involved, freeze-drying preserves the food's nutritional integrity. PetMD confirms that freeze-drying retains the integrity of the food because it avoids high temperatures, keeping proteins, enzymes, and vitamins intact.
Freeze-dried bully sticks are a strong option for puppies, senior dogs, and dogs with dental sensitivity who need a softer chew. The mismatch happens when owners buy them expecting durability. The sublimation process that preserves nutrients also removes the structural density that makes a bully stick last, so knowing your dog's chewing strength upfront saves you money and frustration.
The Trade-Off: Nutrients vs Durability
Every drying method faces the same challenge: remove moisture from beef pizzle without destroying what makes it nutritious. Each solves it differently, and each creates a different trade-off.
Freeze-drying avoids heat entirely, preserving nutrients. But the sublimation process creates microscopic air pockets throughout the beef, making it lightweight, porous, and soft. That's why freeze-dried bully sticks crumble instead of giving your dog a satisfying, extended chew session.
Standard dehydration uses heat (typically 135-165°F) to evaporate water over several hours. This creates a firm, chewable texture that lasts, but the heat partially denatures proteins and degrades heat-sensitive vitamins. According to Dogs Naturally Magazine, dehydrated foods get slightly cooked, changing the food's structure and causing more nutrient loss than freeze-drying.
For a long time, dog owners had to choose: nutrients (freeze-dried, soft) or durability (dehydrated, firm). A newer low-temperature method, Cold-Dried™, was developed to close that gap, and we cover it below.
3 Drying Methods at a Glance
Three methods, three results. The drying process determines protein content, texture, how long a stick lasts, and which dogs it suits. Here's the quick view:
| Feature | Freeze-Dried | Standard (Dehydrated) | Cold-Dried™ |
|---|---|---|---|
| Process | Freezing + sublimation | Heat removes moisture | Low-temp slow drying |
| Crude Protein | ~62% | ~93% | Up to 97% |
| Texture | Soft, porous, crumbly | Firm | Dense, firm |
| Chew Duration | Short | Moderate | Extended |
| Nutrient Retention | High (no heat used) | Partial loss from heat | High (low temp) |
| Best For | Puppies, seniors, sensitive teeth | All chewers, everyday use | Medium-strong chewers |
👉 Want the full breakdown, with protein-and-fat science, durability per calorie, and how to pick for your dog? Read the deep dive: Freeze-Dried vs Dehydrated Dog Treats (full comparison).
Protein and fat percentages from guaranteed analysis labels. Freeze-dried values represent typical industry averages from publicly available data.
A Firmer Alternative: Cold-Dried™ Bully Sticks
If freeze-dried is too soft for your dog, Cold-Dried™ is the alternative built to keep the cold-processing benefit while solving the durability problem. Cold-Dried™ Bully Sticks are the first and only bully sticks made with Natural Farm's proprietary low-temperature drying technology. The process slowly removes moisture at controlled low temperatures, preserving the natural protein structure while creating a dense, firm chew.
Unlike freeze-drying, Cold-Dried™ doesn't create porosity. Unlike standard dehydration, it doesn't use enough heat to denature proteins. The result is a chew that combines the nutrient-preservation of cold processing with the structural density of a firm stick.
Guaranteed Analysis + Reviews
Every dog treat sold in the US must display a guaranteed analysis per AAFCO standards. Here's how Cold-Dried™ compares on paper:
Who Should Use Which?
The best drying method depends on your dog, not on marketing. Here's an honest breakdown:
For the absolute strongest chewers who destroy everything, Braided Power Bully Sticks offer even more durability through dual-protein braided construction. Not sure which format fits your dog? See best bully sticks by chewer type for a full sizing guide.
Safety Note
Regardless of drying method, always supervise chew sessions. Remove any bully stick when it's chewed down to 2-3 inches. Start new chews with short sessions and increase gradually. When to take a bully stick away · Are bully sticks safe for dogs?
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Join Free →Sources and References
- PetMD: Freeze-Dried Food For Dogs: The Pros and Cons
- Dogs Naturally Magazine: Freeze-Dried Dog Food: The Pros and Cons
- AKC: How to Choose Edible Dog Chews That Are Also Safe
- Today's Veterinary Practice: The Benefits and Risks of Chew Treats
- AAFCO: Association of American Feed Control Officials
- FDA Firm Profile: Natural Farm (FEI 3015219441)
- The Spruce Pets: Best Bully Sticks (Natural Farm rated Best Overall)
- Pet Innovation Awards 2023: Rawhide Alternative of the Year
Explore the Full Bully Sticks Cluster
Each guide below goes deeper on one part of the topic.
Frequently Asked Questions
Are freeze-dried bully sticks good for dogs?
Yes, they're safe and nutritious. Freeze-drying preserves vitamins, enzymes, and protein without heat. The main limitation is texture: freeze-dried bully sticks are soft and porous, so they don't provide the extended chewing engagement that most dogs need. They're best suited for puppies, seniors, and dogs with dental sensitivity. For dogs that need more durability, Natural Farm Cold-Dried™ Bully Sticks deliver the nutrient preservation of cold processing with a dense, firm texture.
Do freeze-dried bully sticks last long?
No. The sublimation process creates a porous structure that most medium-to-strong chewers can finish in minutes. If durability matters, standard dehydrated or Cold-Dried™ Bully Sticks are better options. Which dog chews last the longest?
Are freeze-dried bully sticks safe for puppies?
Freeze-dried bully sticks are actually one of the better options for puppies because of their softer texture. They're gentle on developing teeth and gums. For puppies 6+ months with adult teeth who are ready for a firmer chew, Natural Farm Thin or Pixie Bully Sticks are the natural next step.
How much protein is in a freeze-dried bully stick?
Freeze-dried bully sticks typically test around 62% crude protein, lower than the ~93% of standard dehydrated sticks. The difference comes from the porous structure freeze-drying creates, which retains more fat relative to protein. Check the guaranteed analysis on any product for exact figures, since formulations vary by brand.
Why do Cold-Dried™ Bully Sticks have up to 97% protein?
The Cold-Dried™ process removes moisture at temperatures low enough to preserve protein chains intact rather than breaking them down through heat. With less moisture and minimal fat (1%), the remaining composition is almost entirely protein. Standard dehydration partially denatures proteins through heat, resulting in ~93%. Freeze-dried products often show lower protein percentages because the porous structure retains more fat relative to protein.
Are Cold-Dried™ Bully Sticks safe for dogs?
Yes. Natural Farm Cold-Dried™ Bully Sticks are 100% natural and single ingredient (grass-fed beef pizzle), fully digestible, and splinter-free. They break down safely in the stomach. Always supervise chew sessions and remove the stick at 2-3 inches. Bully stick safety guide
Are Cold-Dried™ Bully Sticks odor-free?
Yes. Natural Farm's Cold-Dried™ process controls moisture removal at low temperatures without producing the compounds that cause strong smells in other processing methods. Like all Natural Farm bully sticks, they are odor-free by default. Do bully sticks go bad?
How are bully sticks processed?
All bully sticks start as a single ingredient, beef pizzle (bull muscle), which is cleaned and then dried to make it shelf-stable. The drying method is what differs: standard dehydration uses low heat (135-165°F), freeze-drying uses sublimation with no heat, and Cold-Dried™ uses proprietary low-temperature drying. Natural Farm bully sticks contain no additives, chemicals, or preservatives, and are naturally odor-free. What are bully sticks made of?
Can you freeze bully sticks?
Yes. Freezing bully sticks is safe and can extend their freshness, though it isn't required since sealed bully sticks are already shelf-stable at room temperature. Freezing is most useful for a stick your dog has already started chewing: seal it in a bag first to prevent freezer odors. Some owners also freeze a fresh stick to make it slightly firmer and longer-lasting. Let it return to room temperature before giving it back. Do bully sticks go bad?
Where can I buy Cold-Dried™ Bully Sticks?
Cold-Dried™ Bully Sticks are exclusive to Natural Farm. Available on naturalfarmpet.com and through Amazon. No other brand offers Cold-Dried™ technology because the process is proprietary.
Want the bigger picture?
This guide is part of our Complete bully sticks hub, covering every type, size, and safety question. Or explore the broader All-natural dog chews guide.
About Natural Farm
Natural Farm produces premium, 100% natural, single ingredient dog chews and treats in their own human-grade, FDA-registered, USDA-inspected facilities. Founded in 2018. Every product is grass-fed, naturally odor-free, manufactured in-house, and third-party lab tested.
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