Did you know that zoo animal bedding is more than just a soft place for animals to rest? In fact, proper bedding plays a critical role in absorbing moisture, controlling odors, and providing animals with a sense of security.
However, choosing the right bedding materials requires careful consideration. At zoos across the United States, keepers are constantly evaluating different options for comfort, cost, and sustainability. The ideal bedding should provide cushioning, protect animals from cold and drafts, and effectively absorb moisture to keep them dry.
Beyond basic comfort, the right substrate can dramatically impact animal health and behavior. For example, giraffes at Zoo Atlanta spend an average of 5.5 hours each night lying down, making their bedding choice particularly important. Additionally, innovative options like bio-floors with thick layers of substrate can naturally break down animal waste while reducing maintenance time.
In this guide, we'll explore the various types of zoo animal bedding available, how to select the appropriate materials for different species, and share best practices from leading zoos. Whether you're managing a large zoo or smaller animal care facility, these insights will help you create cleaner, healthier, and more comfortable habitats for your animals.
Selecting appropriate substrate materials is fundamental to creating healthy zoo environments. Each bedding type offers distinct advantages and limitations based on animal needs, maintenance requirements, and sustainability factors.
Straw and hay: traditional but limited
Straw remains among the most common animal bedding materials worldwide due to its wide availability and relatively low cost. With excellent insulating properties, straw repels moisture and traps heat, making it particularly valuable in colder climates. Straw typically contains hollow stems that create air pockets to hold warmth, alongside good absorbency (holding 2.1 times its weight in water). Nevertheless, poor quality straw can contain dust or fungal spores that may worsen respiratory conditions in sensitive animals.
Hay, although similar in appearance to straw, should not be confused as a bedding material. Despite being soft and comfortable, hay absorbs moisture rather than repelling it, making it prone to mold and bacterial growth. Furthermore, since hay is primarily intended as feed, animals may consume their bedding, potentially leading to inadequate nutrition or digestive complications.
Wood Shavings and Pellets — Common but Inconsistent
Wood shavings and wood pellets remain widely used in zoo and large-animal environments due to their availability and familiarity. However, performance can vary significantly depending on wood source, processing quality, and moisture content at the time of packaging.
One common issue with wood-based bedding is dust generation. As wood products break down through handling and animal movement, fine particulates can accumulate, potentially impacting air quality in enclosed habitats. Additionally, because wood material is often processed and stored outdoors prior to bagging, bags may contain inconsistent moisture levels, including wet or partially degraded material before use.
Absorbency claims also vary. While some pine shavings and pellets are marketed as highly absorbent, real-world performance often depends on how many bags are required to achieve adequate depth and dryness. Standard wood bedding bags typically range from 5.5 to 8 cubic feet, which can require a higher number of bags to establish and maintain deep bedding systems versus competitors like hemp bedding.
In practical testing environments, pelletized wood bedding frequently requires 8–12 bags to achieve a deep bedding method, even after activation with moisture. Storage efficiency is often overstated as well, as pallet quantities for wood pellets, shavings, and hemp bedding are generally comparable, limiting any true logistical advantage.
Sand and soil: natural but high maintenance
Sand provides excellent drainage and creates a highly comfortable surface that conforms to animals' body curvature. At Copenhagen Zoo and Dublin Zoo, elephants thrive on sand substrate systems with proper drainage infrastructure. Similarly, Zoo Atlanta found that river sand offers superior cushioning compared to pine shavings for giraffes.
Despite these benefits, sand requires significant maintenance. Large particles can cause abrasions on animals, while sand's limited absorbency creates cleaning challenges. Sand floors also generate considerable dust, necessitating regular moistening or misting systems to maintain air quality.
Newspaper and recycled materials: eco-friendly options
Paper-based bedding offers impressive environmental advantages while delivering practical benefits. Studies from the University of Vermont found that paper bedding absorbs water at rates four to six times greater than dry sawdust and ten times greater than straw. Consequently, paper bedding systems can significantly reduce material usage, with University of Florida research showing horses required only 12.2 pounds of paper bedding daily compared to 17.9 pounds of straw.
Additionally, recycled paper products typically contain minimal dust and no oils, making them ideal for animals with respiratory sensitivities or allergies. The material breaks down much faster than wood shavings, resulting in smaller, more manageable waste piles.
Hemp Bedding — A Low-Dust, High-Coverage Alternative to Wood
Hemp bedding offers a distinct alternative to traditional wood products, particularly for facilities seeking greater consistency, lower dust, and improved coverage per bag.
Unlike many wood-based materials, hemp bedding maintains its structure longer and is naturally low in dust, helping reduce airborne particulates as bedding breaks down. This characteristic is especially valuable in enclosed or sensitive habitats where air quality is a priority for both animals and caretakers.
Coverage efficiency is another key differentiator. Hemp bedding is packaged in 10 cubic foot bags, providing more usable material per unit compared to typical wood bedding formats. In deep bedding applications, operational testing has shown that approximately 5–7 bags of hemp bedding can achieve comparable coverage and performance to 8–12 bags of wood pellets, reducing handling, labor, and storage demands over time.
Hemp’s fibrous structure allows moisture to move downward while keeping the surface drier, extending usable life between clean-outs. This durability reduces bedding replacement frequency and contributes to more predictable maintenance schedules compared to wood products that can compact, break down into dust, or become unevenly saturated.
For zoos evaluating bedding materials through the lens of air quality, coverage efficiency, and long-term labor reduction, hemp bedding presents a compelling, operationally efficient alternative to conventional wood shavings and pellets.
Bio-floors and deep mulch: long-term solutions
For permanent installations, bio-floors represent a significant advancement in zoo habitat design. These systems typically utilize 50+ centimeters of natural substrate that remains in place for years without complete replacement. The deep substrate layers support beneficial microorganisms that continuously break down animal waste, reducing odors and improving air quality.
Materials for bio-floors vary by application—from sand for elephants to mulched bark for primates and big cats. At Osnabrueck Zoo, monkey exhibits feature a 50-centimeter layer of bark chips atop branches for aeration, creating a system that requires minimal replacement. These bioactive substrates not only reduce maintenance needs but also encourage natural behaviors such as digging and foraging, contributing significantly to animal welfare.
Matching the right bedding to each animal species requires careful consideration of multiple factors. Proper substrate selection supports animal welfare, encourages natural behaviors, and maintains clean habitats.
Consider animal size and weight
Large mammals like elephants and giraffes require deep, cushioning substrates that prevent joint pressure during rest periods. For these species, sand offers superior body conformity with proper drainage infrastructure. In contrast, smaller animals need less bedding depth but often require higher absorbency rates. Generally, heavier animals benefit from firmer bedding materials that won't compress completely under their weight.
Account for natural behaviors like digging or nesting
Many species have strong instinctual needs that bedding must accommodate. Rodents and small mammals exhibit powerful nesting instincts requiring appropriate materials like shredded paper. Bedding materials should enable natural behaviors—primates, warthogs, and tapirs benefit from substrate that encourages digging and foraging. Willow chip bedding specifically promotes mental stimulation through exploration opportunities. Before selecting bedding, observe which natural behaviors are essential for your species' psychological well-being.
Match bedding to species-specific hygiene needs
Different animals produce varying amounts of waste, affecting bedding requirements. Guinea pigs need highly absorbent materials because of their sensitive skin. Species with high urine output like calves require substrates that keep them dry, as wet hair coats lead to increased grooming and bacterial ingestion. For birds, bedding cleanliness is critical—inadequate materials can cause aspergillosis in neonatal parrots.
Avoid toxic or irritating materials
Cedar shavings contain aromatic oils harmful to small animals, chickens, and many other species. Pine shavings may affect respiratory health in sensitive animals unless kiln-dried. Black walnut wood products are toxic to horses, causing allergic reactions. Always verify bedding materials are free from pesticides, chemicals, and mold before use.
Proper installation and maintenance of zoo animal bedding systems are crucial for animal health and habitat sustainability. Following established best practices ensures both cleanliness and longevity of your bedding investment.
Ensure proper drainage and ventilation
Effective drainage prevents moisture accumulation that can lead to bacterial growth and odors. Installing drainage mats underneath bedding layers provides significant benefits—Frankfurt Zoo uses 3cm perforated synthetic tiles that efficiently divert water to drainage outlets. A geotextile layer placed between drainage systems and bedding prevents material from clogging drains.
Ventilation remains equally important, even if challenging during winter months. Stagnant moisture increases ammonia levels, affecting respiratory health. Therefore, opening doors or using fans during warmer parts of winter days can significantly reduce humidity levels.
Layering techniques for deep mulch systems
For bio-floors and deep mulch systems, I recommend a minimum depth of 50cm to maintain effectiveness for 8-10 years without complete replacement. When installing these systems:
This layering creates an ideal 30:1 carbon-to-nitrogen ratio, enabling beneficial microorganisms to continuously break down waste.
How to monitor moisture and odor levels
Your nose serves as a reliable indicator—strong ammonia or sulfur smells indicate insufficient carbon materials. Visually, properly maintained bedding should be moist enough to hold together when squeezed but not dripping wet. Essentially, mulch must remain consistently damp (not wet) to prevent dust formation while enabling biological decomposition activity.
Regular moisture monitoring prevents two common problems: overly dry bedding creating dust, and excessive moisture causing mildew. For large enclosures, consider installing overhead misting systems that maintain optimal moisture levels.
Cleaning schedules for animal care facility hygiene
Daily maintenance should include:
Weekly deep cleaning involves applying disinfectant (except in bio-floor systems), allowing it to stand for 10 minutes, then rinsing thoroughly. For youngstock areas, cleaning frequency must increase as their immune systems cannot fight disease as effectively as adults.
When and how to replace or refresh bedding
Complete bedding replacement depends primarily on animal type. Horse stalls typically require weekly replacement, whereas chicken coops need refreshing every 1-2 weeks. Rodent habitats need at least twice-weekly changes due to strong urine odors.
For deep bedding systems, instead of complete removal, add fresh layers atop existing bedding whenever soiled areas appear. After winter, plan for complete replacement as thawing can oversaturate even the most absorbent materials. When removing old bedding from bio-floors, save a thin bottom layer to maintain beneficial microorganisms for the next installation.
Real-world case studies from zoos offer valuable insights into bedding effectiveness across different species and environments.
Giraffe substrate study: sand vs shavings
Zoo Atlanta conducted an innovative study tracking giraffes' nighttime behaviors to determine optimal bedding. Surprisingly, researchers discovered giraffes spend approximately 5.5 hours each night lying down, making their substrate choice especially critical. Initially, the habitat used pine shavings but switched to river sand during construction. While sand provided superior cushioning, it created excessive dust and required intensive maintenance. Using night vision cameras to record habitat use, keepers discovered giraffes predominantly stayed indoors overnight, spending merely 1-2 hours outside. This unexpected finding influenced their subsequent decision to implement seasonal substrate rotation.
Hemp in primate and reptile enclosures
Moody Gardens Zoo in Galveston transformed animal habitats through hemp bedding implementation. For their Blood Python, the low-dust qualities helped maintain essential humidity balances. Northern Tree Shrews benefited from hemp's exceptional absorbency, which supported their constant foraging activities. Most notably, Prehensile-Tailed Porcupines thrived with hemp bedding's respiratory benefits, as traditional wood shavings created irritating dust.
Lessons from seasonal substrate changes
Seasonal adjustments prove essential for optimal animal comfort. Oklahoma City Zoo increases straw bedding significantly during winter—zebras transition from two summer servings to eight winter servings. Likewise, California sea lions receive increased diets to develop insulative fat layers. Conversely, elephants and okapi remain indoors when temperatures drop below 45-50 degrees. Interestingly, cold-adapted species like red pandas show heightened activity during snow events, underscoring how substrate needs vary dramatically throughout seasonal cycles.
Selecting the right bedding for zoo animals requires thoughtful consideration of multiple factors. Throughout this guide, we have explored various bedding options from traditional straw to innovative bio-floors, each offering unique benefits for different species. Above all, proper bedding selection significantly impacts animal welfare, habitat maintenance, and overall zoo operations.
Animal needs must drive bedding decisions. Therefore, keepers should assess species-specific requirements including size, natural behaviors, and hygiene patterns before making selections. Hemp bedding stands out as an exceptional option due to its superior absorbency, dust-free properties, and natural antimicrobial qualities that benefit multiple species.
Proper installation and maintenance ultimately determine bedding effectiveness. Drainage systems, ventilation, moisture monitoring, and appropriate cleaning schedules work together to create healthy habitats. Meanwhile, bio-floor systems offer revolutionary long-term solutions that reduce maintenance while encouraging natural behaviors.
Real-world examples from zoos across the country demonstrate these principles in action. Zoo Atlanta's giraffe study revealed unexpected insights about nighttime behavior affecting substrate needs. Similarly, seasonal adjustments prove essential as animals require different bedding depths and types throughout the year.
The perfect zoo animal bedding balances animal comfort, keeper practicality, and sustainability concerns. After implementing the strategies outlined in this guide, you will create cleaner, healthier, and more comfortable habitats for your animals. Most importantly, these improvements will enhance animal welfare while potentially reducing maintenance time and costs—truly a win-win situation for animals and keepers alike.
About Dominion Hemp
Dominion Hemp is a Virginia-based distributor of high-quality hemp bedding for zoos. Dominion Hemp works to innovate on tradition and distribute an American-grown, sustainable, efficient animal bedding product. The low-dust, grade-A quality of Dominion Hemp bedding provides a comfortable and healthy resting place for animals. To protect your animals’ and zookeepers’ airways and keep habitats cleaner, longer, Contact Dominion Hemp today.
Q1. What are the most effective types of bedding for zoo animals?
The most effective bedding types vary by species but generally include wood shavings, sand, hemp, and bio-floors. Wood shavings are highly absorbent, sand provides excellent drainage for large animals, hemp offers superior dust control and absorbency, while bio-floors create long-term, low-maintenance solutions that encourage natural behaviors.
Q2. How often should zoo animal bedding be changed?
The frequency of bedding changes depends on the species and type of bedding used. Generally, solid waste and heavily soiled areas should be removed daily. Complete bedding replacement varies from weekly for some animals to several years for deep mulch systems. Bio-floors can last 8-10 years with proper maintenance and occasional top-ups.
Q3. What are the benefits of using hemp bedding in zoo enclosures?
Hemp bedding offers several advantages for zoo animals. It's highly absorbent, capable of holding up to four times its weight in moisture. It's also 99% dust-free, which is crucial for animals with respiratory sensitivities. Additionally, hemp has natural anti-bacterial and anti-fungal properties, helping to maintain cleaner and healthier habitats.
Q4. How does seasonal change affect bedding requirements for zoo animals?
Seasonal changes significantly impact bedding needs. During colder months, many animals require increased bedding depth for insulation. For example, some zoos increase straw bedding for zebras from two summer servings to eight in winter. Conversely, warm-weather adaptations might include reducing bedding to prevent overheating or using materials with better cooling properties.
Q5. What factors should be considered when choosing bedding for different species?
When selecting bedding for different species, consider the animal's size and weight, natural behaviors (like digging or nesting), specific hygiene needs, and potential toxicity of materials. It's also important to account for the animal's habitat requirements, such as moisture levels for reptiles or foraging opportunities for primates. The bedding should promote the animal's overall health, comfort, and natural behaviors.