Coonhound Science: Scent Drive & Treeing Instincts
Explore the canine science behind the dogs from Where the Red Fern Grows — Redbone and Bluetick Coonhound scent drive, treeing behavior, and genetics.
Quick Answer: The dogs from Wilson Rawls' novel Where the Red Fern Grows are two coonhound breeds: Old Dan is widely interpreted as a Redbone Coonhound and Little Ann as a Bluetick Coonhound. These breeds were developed in the American South for raccoon hunting using a behavior called treeing — tracking prey by scent across miles of terrain, then pinning it in a tree while barking to alert the hunter. Their extraordinary scent-tracking ability stems from possessing up to 300 million olfactory receptors (compared to roughly 6 million in humans) and a vomeronasal organ that processes chemical signals at concentrations as low as parts per trillion.
If you grew up reading Wilson Rawls' 1961 classic, you probably remember Old Dan and Little Ann as vividly as any real dog you've owned. But beyond the emotional story lies a fascinating intersection of canine genetics, evolutionary biology, and selective breeding that produced two of America's most specialized working dogs. Understanding the science behind coonhound behavior doesn't diminish the magic — it deepens our appreciation for what these dogs are neurologically and physically built to do.
What Breeds Are the Dogs From Where the Red Fern Grows?
Rawls never explicitly names the breeds in the novel, setting the story in the Ozark Mountains of Oklahoma during the Great Depression era. However, decades of breed-historian consensus, AKC records, and contextual clues point to two distinct coonhound varieties:
| Trait | Old Dan (Redbone Coonhound) | Little Ann (Bluetick Coonhound) |
|---|---|---|
| AKC Group | Hound (recognized 2009) | Hound (recognized 2009) |
| Weight Range | 56–75 lb / 25–34 kg (males) | 45–80 lb / 20–36 kg |
| Height | 22–27 in / 56–69 cm | 21–27 in / 53–69 cm |
| Coat Color | Solid rich red, deep mahogany | Blue-mottled with black spots and tan points |
| Lifespan | 10–12 years | 11–12 years |
| Primary Function | Scent tracking, treeing, endurance | Cold-nose tracking, night hunting |
| Origin | Southern US (Bloodhound × Foxhound crosses) | Southern US (French Grand Bleu de Gascogne × English Foxhound) |
| Estimated Puppy Cost (2026) | $800–$1,500 from responsible breeder | $700–$1,400 from responsible breeder |
The novel's description of Old Dan as a powerful, muscular red dog and Little Ann as a smaller, sleeker, blue-speckled female matches the physical standards published by the AKC Redbone Coonhound breed page and the AKC Bluetick Coonhound breed page almost exactly.
The Science of Scent: How Coonhounds Process Smell at a Superhuman Level
Olfactory Architecture: By the Numbers
Understanding why coonhounds can track a raccoon across miles of Ozark forest at night requires examining the physiological hardware they carry:
- ~300 million olfactory receptors in the nasal cavity (Bloodhound lineage) vs. ~6 million in humans
- Olfactory bulb size: roughly 40× larger relative to total brain volume than in humans
- Vomeronasal organ (Jacobson's organ): a secondary scent-processing structure in the roof of the mouth that detects pheromones and non-volatile chemical compounds
- Scent discrimination threshold: capable of detecting odor concentrations at parts per trillion — equivalent to detecting a single teaspoon of sugar dissolved in two Olympic-sized swimming pools
- Nasal airflow separation: specialized turbinates allow continuous inhalation for scent sampling while simultaneously exhaling through side slits, meaning the dog never has to "pause" breathing to smell
Research published in the journal Applied Animal Behaviour Science has demonstrated that scent hounds process odor plumes using a technique called stereo olfaction — comparing scent concentration between the left and right nostrils to triangulate the source direction, much like how humans use two ears to locate sound. A 2020 study by researchers at Eötvös Loránd University in Budapest confirmed that dogs use their right nostril preferentially for novel or biologically significant scents, routing that information to the right brain hemisphere for threat-and-prey assessment.
For coonhounds specifically, the "cold nose" ability — tracking scent trails that are hours or even days old — is what distinguishes breeds like the Bluetick from "hot nose" hounds that need fresher trails. The Bluetick's French Grand Bleu de Gascogne ancestry contributes to this cold-tracking specialization, a trait selected over centuries for hunting in conditions where prey may have passed through an area long before the hunt begins.
Treeing Behavior: The Evolutionary Basis of a Uniquely Canine Hunting Strategy
From Wolf Pack to Treeing Hound: An Evolutionary Path
Wolves don't tree prey. The treeing instinct in coonhounds is a product of selective breeding layered on top of ancestral predatory motor patterns. Ethologist Dr. Raymond Coppinger described the canine predatory sequence as: orient → eye → stalk → chase → grab-bite → kill-bite → dismember → consume. Treeing behavior essentially "freezes" the sequence at the chase phase and substitutes vocalization for the grab-bite.
In wolves, the full predatory sequence is intact because survival requires completing the kill. In treeing hounds, breeders over roughly 200 years of American coonhound development selected for dogs that would chase prey to a tree, stop, and bark persistently rather than attempting to climb or dig. This behavioral modification required suppressing the grab-bite phase while amplifying the vocalization component — something wolves do during group hunting to coordinate pack members, but at far lower intensity and duration.
The treeing bark itself is physiologically distinct from a dog's alert bark or play bark. Research on canine vocalization has identified that coonhound "baying" — the deep, resonant, repetitive vocalization used while treeing — involves a modified laryngeal structure. Coonhounds possess a larger, more flexible vocal fold arrangement that allows sustained low-frequency sound production for extended periods (sometimes hours) without vocal fatigue. This is why a Redbone or Bluetick can bay continuously through the night while a typical pet dog would become hoarse within minutes of sustained barking.
The neurological mechanism involves the hypothalamus and periaqueductal gray matter, brain regions that govern instinctive vocalization in mammals. When a coonhound locks onto a raccoon scent and reaches the tree, sensory input from the olfactory system triggers a dopamine-mediated reward response in the nucleus accumbens — the same brain region involved in motivation and reward-seeking across species. The dog isn't simply "alerting" in a cognitive sense; it's experiencing a neurochemical reward state that reinforces the baying behavior. This is why punishing a coonhound for baying is both ineffective and counterproductive — the behavior is driven by deep neurochemical reinforcement, not conscious choice.
Why Do Coonhounds Howl and Bay? Is This Behavior Normal?
Yes, baying is entirely normal and expected in coonhound breeds — but understanding the different vocalizations helps owners distinguish between healthy instinctive behavior and potential distress signals:
| Vocalization Type | What It Sounds Like | What It Means |
|---|---|---|
| Baying (treeing call) | Deep, rhythmic "arooOOoo" — sustained, repetitive, carries up to 1 mile | Prey is located and pinned; dog is in active reward-state. Normal and healthy. |
| Trailing bark | Shorter, choppier barks interspersed with sniffing pauses | Dog is actively following a scent trail; excitement building. Normal. |
| Lonesome howl | Long, mournful, rising-and-falling single note | Social isolation distress or response to distant sirens/dogs. May signal separation anxiety if excessive. |
| Whining/whimpering | High-pitched, nasal, intermittent | Anticipation, frustration, or pain. If persistent without obvious trigger, consult your veterinarian. |
| Silent (no vocalization on trail) | Dog tracks without any vocal output | Considered a fault in working coonhounds; in pets, may indicate illness or extreme fatigue. |
Common Misconceptions About Coonhounds Debunked
Decades of folklore and pop-culture portrayals have generated persistent myths about the breeds featured in Where the Red Fern Grows. Let's separate science from storytelling:
Myth
"Coonhounds are unintelligent because they're hard to train."
Fact
Coonhounds exhibit independent problem-solving intelligence, not low intelligence. They were bred to work at distances of up to a mile from their handler, making autonomous decisions about trail direction. Standard obedience training methods designed for biddable breeds (Border Collies, Golden Retrievers) fail because they don't account for this independence. Force-free training using high-value food rewards and scent-based enrichment works effectively — it simply requires more patience and creativity.
Myth
"Redbones and Blueticks are aggressive because they're hunting dogs."
Fact
Both breeds are known for gentle, sociable temperaments with humans and other dogs. Coonhounds hunted in packs, so aggression toward other dogs was actively selected against. The AKC breed standard explicitly lists aggression as a disqualifying fault. High prey drive toward small animals (cats, rabbits, squirrels) is normal and expected — but this is not aggression toward people or canine housemates.
Myth
"They can't live in apartments or cities."
Fact
While a securely fenced yard (minimum 6-foot fence — coonhounds are athletic climbers) is strongly recommended, the limiting factor isn't space — it's exercise fulfillment and scent enrichment. A coonhound receiving 60–90 minutes of structured aerobic exercise daily plus scent-work games can adapt to suburban living. The real barriers are vocalization (baying carries far and will generate noise complaints) and prey drive (off-leash recall in unfenced areas is extremely unreliable).
Practical Implications for Owners: Living With a Coonhound in 2026
What This Science Means for Your Daily Routine
Exercise requirements (data-driven):
- Minimum: 60 minutes of structured aerobic activity daily (running, hiking, flirt pole, swimming)
- Ideal: 90–120 minutes, split into 2 sessions — coonhounds have endurance-type physiology with high slow-twitch muscle fiber ratios
- Mental stimulation: 20–30 minutes of scent-work daily (snuffle mats, hidden treat games, formal nosework classes) — this is non-negotiable for behavioral health
Containment requirements:
- Fence height: minimum 6 feet (1.8 m), with no gaps larger than 4 inches
- Dig-proof barrier: bury hardware cloth 12 inches below fence line, or install a concrete footer
- GPS collar recommendation: Garmin Alpha 300i ($700–$800) or Fi Series 4 GPS collar ($149 + $99/year subscription) — essential for any coonhound that spends time off-leash in unfenced areas
Nutrition specifics:
- Active adult coonhound (60 lb / 27 kg): approximately 1,400–1,800 kcal/day depending on activity level
- Look for AAFCO complete-and-balanced statement with minimum 22% protein for adult maintenance, 26%+ for working/active dogs
- Joint supplements: glucosamine HCl (500 mg/day) + chondroitin sulfate (400 mg/day) recommended from age 2+ due to hip dysplasia risk — consult your veterinarian before starting any supplement
Health screening costs to budget for:
- OFA hip evaluation: $200–$350
- OFA elbow evaluation: $200–$350
- CERF eye examination: $80–$150
- Annual wellness bloodwork: $150–$300
- Total first-year health screening budget: $630–$1,150 beyond standard puppy vaccinations
When Scent-Tracking or Baying Behavior Signals a Medical Problem
While treeing instinct and vocalization are normal breed traits, certain changes in behavior warrant veterinary attention:
Red Flags: When to Consult Your Veterinarian
- Sudden loss of interest in scent/tracking: May indicate olfactory nerve damage, nasal tumor, or cognitive dysfunction syndrome (especially in dogs 8+ years). Nasal adenocarcinoma, while uncommon, has higher prevalence in dolichocephalic (long-nosed) breeds.
- Excessive vocalization without environmental trigger: Persistent baying or howling when no prey, scent, or social stimulus is present may signal pain, neurological issues, or canine cognitive dysfunction. This is distinct from normal "lonesome howling" when left alone.
- Stereotypic circling or pacing with nose to ground: Repetitive, non-functional tracking behavior that the dog cannot be interrupted from may indicate a compulsive disorder or partial seizure activity.
- Nasal discharge with behavioral change: Unilateral (one-sided) nasal discharge combined with decreased tracking performance warrants imaging to rule out fungal rhinitis (Aspergillus infection) or nasal mites (Pneumonyssoides caninum).
- Sudden vocalization change: A previously vocal dog becoming silent, or a quiet dog suddenly vocalizing excessively, should prompt a laryngeal examination to rule out laryngeal paralysis — a condition with elevated prevalence in older large-breed hounds.
Always consult your veterinarian if you observe sudden behavioral changes. Early diagnosis of conditions like laryngeal paralysis or cognitive dysfunction significantly improves prognosis and quality of life.
How Is Coonhound Scent Processing Different From Humans?
The comparison isn't simply "dogs smell better" — the differences are structural, neurological, and profound:
| Feature | Human | Coonhound (Redbone/Bluetick) |
|---|---|---|
| Olfactory receptors | ~6 million | ~300 million |
| Olfactory bulb proportion of brain | ~0.01% | ~0.31% (roughly 40× larger proportionally) |
| Scent detection threshold | Parts per million | Parts per trillion |
| Breathing while smelling | Must pause to inhale deeply | Continuous sampling via nasal turbinate separation |
| Vomeronasal organ | Vestigial / non-functional in adults | Fully functional — detects pheromones and non-volatile compounds |
| Stereo olfaction | Not present | Left/right nostril comparison for directional tracking |
| Temporal scent resolution | Cannot distinguish "when" a smell was deposited | Can determine trail age by scent degradation rate — effectively "smells time" |
That last point — temporal scent resolution — is what makes coonhound tracking so remarkable. By detecting the degree to which volatile organic compounds have degraded along a trail, a trained coonhound can determine not just where a raccoon traveled, but how long ago it passed through. This is the physiological basis of "cold nose" tracking ability, and it represents a sensory dimension that humans simply do not possess.
Frequently Asked Questions
Did Wilson Rawls base Old Dan and Little Ann on real dogs?
Rawls drew on his own childhood experiences in the Ozarks, where he hunted with coonhounds as a boy. He has stated in interviews that the emotional core of the novel was autobiographical, though the specific dogs were fictional composites. The breed descriptions, behaviors, and hunting dynamics in the novel are considered highly accurate representations of Redbone and Bluetick Coonhound working styles by breed historians and experienced coonhunters.
Can I own a Redbone or Bluetick Coonhound if I don't hunt?
Absolutely — both breeds are kept as companion animals, and many excel in canine sports like nosework, barn hunt, and lure coursing. The key requirement is providing an outlet for their scent-drive and endurance. Without structured scent enrichment and aerobic exercise, coonhounds are prone to destructive behavior, excessive vocalization, and escape attempts. Consider enrolling in formal AKC Scent Work trials or NACSW (National Association of Canine Scent Work) classes — these provide the mental stimulation coonhounds need without requiring hunting.
How do coonhounds compare to Beagles in scent ability?
Both are scent hounds, but coonhounds possess significantly greater olfactory receptor counts (inherited from Bloodhound and Foxhound ancestry) and larger body size, which allows for greater stride length and endurance during long tracking sessions. Beagles typically work closer to the handler and excel at short-range ground scenting (rabbits, hares). Coonhounds are built for distance tracking and vertical prey location (treeing). A useful comparison: Beagles are sprint-trackers for small ground game; coonhounds are marathon-trackers that add a vertical prey-pinning behavior.
Is it true that coonhounds can track in the rain?
Yes — and this is where the science gets interesting. Moisture actually enhances scent availability because water molecules trap volatile organic compounds near the ground surface and prevent their rapid atmospheric dissipation. This is why experienced coonhunters often prefer hunting after light rain or during high-humidity conditions. Heavy downpours, however, can wash away scent deposits from ground surfaces, temporarily reducing trail quality. According to the Merck Veterinary Manual, canine olfactory function is generally enhanced in humid conditions compared to dry, hot environments where scent molecules evaporate rapidly.
What health issues are Redbone and Bluetick Coonhounds predisposed to?
Both breeds share several breed-specific health concerns prospective owners should screen for:
- Hip dysplasia: Estimated prevalence of 8–15% based on OFA database submissions. Screening via OFA or PennHIP recommended at 24 months.
- Ear infections (otitis externa): Long, pendulous ears trap moisture — weekly ear cleaning with a veterinarian-approved solution is essential. Budget $50–$100/year for preventive ear care products.
- Bloat (Gastric Dilatation-Volvulus): Deep-chested breed at elevated risk. Prophylactic gastropexy during spay/neuter surgery ($300–$800 additional cost) is recommended by many veterinarians.
- Progressive retinal atrophy (PRA): Inherited retinal degeneration leading to blindness. DNA testing available (Optigen rcd4 test, ~$130). Responsible breeders test breeding stock.
- Coonhound paralysis (acute polyradiculoneuritis): An inflammatory nerve condition triggered by exposure to raccoon saliva. Symptoms include progressive rear-limb weakness 7–10 days after contact with a raccoon. Most dogs recover fully within 2–6 months with supportive care, but severe cases require veterinary hospitalization.
Consult your veterinarian about appropriate health screening protocols for your specific dog. Responsible breeders will provide OFA/CERF documentation for both parents.
Sources & Further Reading
- AKC Redbone Coonhound Breed Standard — American Kennel Club official breed profile and physical specifications.
- AKC Bluetick Coonhound Breed Standard — American Kennel Club official breed profile and history.
- Craven, M. et al. (2010). "Directional smelling in dogs." Journal of the Royal Society Interface — Research on stereo olfaction in canine scent processing.
- Merck Veterinary Manual — Reference for canine olfactory physiology and breed-specific health conditions.
- Coppinger, R. & Coppinger, L. (2001). Dogs: A Startling New Understanding of Canine Origin, Behavior & Evolution. Scribner. — Foundational text on predatory motor patterns and breed-specific behavioral development.
Anouk Beaumont
All our authors care for dogs every day — read more of their work on the authors page.
