Greg Tilford Spent 11 Years Off-Grid in Montana So Your Dog Wouldn't Need Prednisone Forever

TL;DR

Greg Tilford, founder of Animal Essentials and author of Herbs for Pets, spent 11 years living off-grid in Montana studying 40 medicinal plants on 20 acres before turning herbalism into a career. His core argument: herbal medicine isn't the "alternative" to Western medicine, it's the original medicine, and animals use it more effectively than we do because they're not weighed down by belief systems and doubt. A few things worth taking away: dandelion root has real, peer-reviewed anti-cancer data behind it (a 2016 study found it killed over 95% of colon cancer cells in vitro and slowed tumor growth by more than 90% in vivo, without harming healthy cells). Catnip is more than a cat toy, it's antispasmodic, calming when eaten, and its essential oil is a genuinely effective mosquito repellent. Fleas target weakened, immune-compromised hosts, not just unlucky ones, which means the host's overall vitality matters as much as anything you spray. Licorice root can potentiate prednisone (helpful under a vet's guidance, risky without one). And if you're an overwhelmed 2.0 pet parent stacking fifteen supplements, Greg's advice is blunt: nail your pet's food first, then pick one or two herbs and actually learn them before adding anything else. Full breakdown, the science, and how this all ties back to ReWilding below.

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I recorded this one with Greg Tilford at SuperZoo in Las Vegas, in a noisy convention hall with a TV blasting music in his ear the whole time, which feels like exactly the kind of contrast this conversation was about: ancient plant medicine, discussed over hotel Muzak. Greg is the founder of Animal Essentials, author of Herbs for Pets, and has been formulating herbal medicine for dogs and cats since the 1990s. He's also, genuinely, one of the most interesting people I've had on this show, and this is a long one because there was no part of this conversation I wanted to cut.

Listen to the full episode on The Pet Parenting Reset with Greg Tilford here. 

From canyon kid to off-grid herbalist

Greg's story doesn't start in a classroom. He grew up wandering the canyons of Southern California as a kid, eating wild fennel, showing friends which plants were safe to eat by third grade (his words: "I hope none of them died of liver failure"). Then, like he put it, he went and got his "superhero save the world stuff" out of the way: eight years as a police officer, time as a paramedic before that.

Eventually he and his first wife cashed out their retirement and moved four miles off-grid onto a remote ridge in Montana, skiing in during winter, and lived there for eleven years. On just 20 acres of land, they found 40 different medicinal plants and made medicine from every single one. He started harvesting for the human nutraceutical industry, then noticed something that changed the direction of his whole career: he wasn't the only one using these plants. Wildlife was working through the same landscape, self-selecting the same medicine. That observation sent him down the road to zoopharmacognosy, the study of how animals intuitively select, dose, and discontinue their own herbal treatments.

Zoopharmacognosy is a real, if still-developing, field of study. Documented examples include chimpanzees swallowing rough-leaved plants whole to physically scour out intestinal parasites, and various species selecting plants with compounds that later turn out to have antibacterial or antitumor properties when studied directly (Zoopharmacognosy, Wikipedia; Zoopharmacology: A Way to Discover New Cancer Treatments, PMC). It's still debated how much of this is truly intentional self-medication versus incidental foraging, but the pattern shows up too often across too many species to wave away entirely.

That fascination with plant-animal interaction is what eventually led Greg to found what's now Animal Essentials, starting with a detox formula he wasn't even confident would work fast enough to be clinically useful. He told the first vet who tried it that he didn't think she'd see results for at least a month. She called back in two weeks reporting clearer skin, less inflammation, better GI function. He didn't believe her the first time. Or the second. By the fourth vet reporting the same thing, he pulled the lab work himself.

Herbal medicine isn't the alternative. It's the original.

This is the reframe I want you to sit with: Greg doesn't consider herbal medicine "alternative" medicine. He considers Western pharmaceutical medicine the alternative, a much newer, narrower branch grafted onto thousands of years of plant-based practice that's still the primary medicine for roughly 80% of the world's population outside developed nations. Much of what we know about pharmacology, he points out, was originally learned by watching which plants animals sought out in the wild.

The distinction he draws matters: herbal medicine isn't trying to just swap out a pharmaceutical for a "natural" version of the same forceful intervention. It's trying to support what the body is already built to do for itself. Not fighting disease head-on, but removing the obstacles to the body's own repair systems.

And to be clear, because Greg was explicit about this too: this isn't an anti-medicine stance. He had hip replacement surgery himself and says he walks better now than he ever has, and used herbs specifically to support that recovery. Holistic doesn't mean rejecting every conventional tool. It means using every tool you have with intention, which includes surgery and pharmaceuticals when they're genuinely called for.

The energetics of it (and why animals might do this better than we do)

Here's where the conversation got into territory that a strict rationalist would push back on, and I want to be honest about that rather than smooth it over: Greg's explanation for why herbal medicine seems to work faster and more visibly in animals than in humans is that animals aren't burdened by the mental noise we carry. No skepticism, no cultural conditioning about what "should" work, no placebo expectation dragging the outcome one way or another.

He referenced Dr. Bruce Lipton's The Biology of Belief, and Lipton's line that "magic is just science that hasn't been discovered yet." Whether or not you buy the fully energetic framing, there's a real, non-mystical version of this claim worth taking seriously: stress and cortisol measurably affect immune function and healing in ways we can track in bloodwork, and an anxious pet parent's stress genuinely does transmit to their animal through tone, handling, and routine disruption, not telepathy, just behavioral and physiological contagion that's well documented in human-animal bond research.

Greg's practical takeaway, regardless of how you feel about the energetic framing: regulate yourself first. He mentioned a study Rodney Habib has cited about coming home from a stressful day and showering before interacting with your household, human or animal, specifically to physically and mentally reset before you bring that stress into a shared space. His own rule with his dog Travis: he won't put anything in Travis's mouth that he wouldn't eat himself.

How herbs are grown (and why it's not just about the label)

Greg's take on sourcing surprised me a little, because it wasn't a simple "always buy organic" answer. Certified organic is still preferable, but he was upfront that there's no fully escaping contamination anymore. Glyphosate has been detected even in certified organic oats and wheat, simply because it's so pervasive in rainwater and the broader environment at this point.

What he emphasized instead was intention in the growing and manufacturing process. At Animal Essentials, there's reportedly a real hiring filter: if you don't genuinely love animals, the company doesn't want you working there, because the belief is that the energy of the people making the medicine becomes part of the medicine. You can take that literally or metaphorically, but the practical version is uncontroversial: sourcing from people who care about quality and process, rather than the cheapest possible supply chain, tends to actually show up in the finished product.

Catnip: not just a toy

This is the section I most wanted to dig into further, because catnip is sitting in probably half of your homes right now and most of us have no idea what it actually does.

The euphoric reaction cats have to catnip toys is an olfactory response: cats have receptors in their upper respiratory system that respond to nepetalactone, the plant's active compound, and that's what produces the rolling, drooling, zoomies reaction. But feed catnip to a cat orally, as a tea or tincture, and you get a completely different effect: calming, not stimulating. That's because orally, it acts as an antispasmodic on the gut, similar to how it works as a mild sedative and digestive aid in humans (it's a genuinely good bedtime tea for people too, with a long history of use for nervous stomachs).

The mosquito repellent angle has real research behind it, though it's more nuanced than a flat "better than DEET" claim. The often-cited 2001 Iowa State University finding claimed nepetalactone was roughly ten times more effective than DEET at repelling mosquitoes. More recent, better-controlled studies have found catnip oil performs comparably to DEET rather than dramatically outperforming it, with a 2026 Uganda field trial finding that 6% catnip oil lotion worked about as well as 15% DEET (ScienceDaily, 2001 finding; catnip lotion field trial, Scientific Reports). Either way: this is a genuinely effective, cheap, plant-based repellent option, and Greg's dosing note is worth remembering: too much concentration can flip the effect and start attracting wasps instead.

Fleas, ticks, and the weakened host

Greg's framing here reoriented how I think about parasite prevention entirely: fleas and ticks are opportunistic. If you've ever been in a multi-dog household where one dog is chewed raw with flea allergy dermatitis and the other two aren't bothered at all, that's not random luck. Parasites are drawn to hosts broadcasting weakness, whatever language you want to use for that: a compromised immune system, chronic inflammation, poor vitality.

His approach leans on adaptogens, herbs that support the body's stress response and overall resilience, functioning on the theory that a genuinely well-supported immune system is simply a less attractive target. But he was clear this isn't instead of environmental management, it's in addition to it. Fleas spend roughly 90% of their lifecycle off the host, in carpet, bedding, and the yard, so treating only the animal while ignoring the environment is treating a fraction of the actual problem.

On spot-on treatments specifically, Greg didn't mince words, and the concern isn't unfounded. Fipronil and permethrin, the active ingredients in most conventional spot-on flea products, are effective at killing fleas (studies show reductions in flea counts well above 98%), but they're also documented as suspected endocrine disruptors with links to cancer risk, and they don't stay contained to the treated animal. They transfer to furniture, bedding, other household members, and waterways when pets swim or get bathed, persisting in the environment as what researchers now classify as emerging contaminants of concern (spot-on treatment environmental and endocrine concerns, Pesticide Action Network UK; swimming emissions and environmental risk of spot-on treatments, PMC). That doesn't mean never use them, especially in a genuine tick-borne disease risk area, but it's a real tradeoff worth knowing about rather than assuming it's harmless because it's sold over the counter.

Three herbs to actually start with

Greg's advice for anyone new to herbalism was refreshingly restrained: you don't need to know a thousand plants. Start with a small handful and actually learn them.

Dandelion root was his first recommendation, and it's the one with the most striking research behind it. A peer-reviewed 2016 study in Oncotarget found that aqueous dandelion root extract induced programmed cell death in more than 95% of colon cancer cells within 48 hours, regardless of the cells' p53 mutation status, while leaving healthy cells unharmed. In vivo, oral dandelion root extract slowed tumor growth in colon cancer models by more than 90% (Dandelion root extract affects colorectal cancer proliferation and survival, PMC/Oncotarget). Beyond the cancer research, dandelion root gently supports liver function and keeps detoxification pathways open, which fits Greg's broader point: detox isn't a one-time cleanse, it's an ongoing job the liver does continuously, and dandelion just helps keep that pathway from getting sluggish.

Nettle leaf is his nutritional powerhouse pick, loaded with bioavailable vitamins, minerals, and protein, but the standout mechanism is its effect on allergies. Nettle contains compounds that act on histamine receptors and can blunt histamine release, which is why it shows up so often as a natural option for seasonal and environmental allergies. The clinical research is genuinely mixed rather than a clean win: some trials show real symptom improvement, others show effects not meaningfully different from placebo (stinging nettle root extract for allergic rhinitis, PMC). Worth trying for an itchy, allergic dog, just don't expect it to work miracles for every case.

Calendula rounds out the trio, useful both internally and topically. As a cool tea rinse, it soothes irritated skin; taken internally, it supports lymphatic drainage, and Greg mentioned pairing it with medicinal mushrooms specifically for lipoma support.

The licorice root and prednisone conversation (handle with care)

This is the part of the episode I want to flag most carefully, because it's a genuine drug interaction, not just an herbal folk claim. Licorice root contains glycyrrhizin, which inhibits the enzyme that breaks down cortisol in the body, effectively potentiating corticosteroids like prednisone. Greg described veterinarians using this intentionally to lower a patient's prednisone dose over time, working toward tapering off the steroid entirely in favor of licorice root support.

The pharmacology behind this is real and documented (glycyrrhizin and corticosteroid potentiation mechanism, HelloPharmacist), which is exactly why this isn't a DIY swap. Potentiating a steroid without adjusting the dose under veterinary supervision risks overcorrection in the other direction. This is a genuinely powerful example of integrative medicine done well, herbs and pharmaceuticals working together, but it needs a vet who understands both sides of that equation, not a guess based on a podcast.

For the overwhelmed 2.0 pet parent: less is more

If you're deep in the world of holistic pet health and feel like you're supposed to be doing quercetin, fish oil, mushrooms, a homeopathic blend, adaptogens, and a probiotic all at once, Greg's advice was blunt: stop. More isn't better, especially once you're stacking ten or fifteen things a day, because you lose all ability to tell what's actually working, and you risk the combination working against itself.

His actual protocol: get food right first. Biologically appropriate, high quality, varied. That's the foundation everything else sits on. Then pick one or two herbs or modalities, whichever genuinely interests you, whether that's herbalism or homeopathy, and actually learn them before adding a third thing. Don't take the kitchen-sink approach hoping quantity will substitute for understanding.

Symptoms are clues, not the enemy

One of the more useful reframes from this conversation: symptoms aren't the problem to eliminate, they're information about an underlying imbalance. Greg's analogy: taking an aspirin for a headache caused by dehydration makes the pain go away without addressing why it happened in the first place. He's blunt with veterinarians he consults with about this too, cutting through a long disease-name diagnosis to ask: what systems are actually involved, what isn't functioning well enough right now? That's the actual target.

This connects to something Greg calls antipathogenic herbs, as distinct from antibiotics. Herbs like dandelion root target only pathogenic organisms while leaving beneficial bacteria intact or even supporting them, rather than the scorched-earth approach of broad-spectrum antibiotics that wipe out everything indiscriminately. Given how urgently antibiotic resistance is becoming a real crisis in both human and veterinary medicine, herbs that can selectively target harmful pathogens without collateral damage to the microbiome are worth genuine scientific attention, not dismissal.

How this ties back to ReWilding

This entire conversation is ReWilding in practice, maybe more directly than any guest I've had on this year. Greg didn't just talk about herbs as a supplement category, he talked about re-establishing a relationship with the natural world that we've almost entirely severed: knowing the plant growing in the yard we call a weed, understanding that dandelion isn't garbage to poison but one of the most quietly powerful medicines available to us for free, recognizing that our own dogs and cats are, in his words, "canaries in a coal mine" for the toxic load we've normalized in daily life.

The core of ReWilding isn't rejecting every modern convenience. It's remembering that our pets, and we ourselves, are still animals embedded in an ecosystem, not machines to be managed with the most convenient chemical intervention available. Greg's point about spot-on flea treatments as endocrine disruptors, about glyphosate showing up even in certified organic crops because it's now simply everywhere in our air and water, about pets developing diseases at accelerated rates compared to us because their lifespans compress the same toxic exposure into a fraction of the time: none of that is fear-mongering. It's just an honest accounting of the world we've built, and a genuine invitation to do something different where we actually can. Learn the plant. Meet it in person if you can. Understand what it does and why, instead of treating every remedy as a mysterious brown liquid in a bottle.

Where to find Greg

Greg is building out his new platform on Substack, The Animal Herbalist, where he's publishing articles, hosting webinars, and previewing the three books he's currently writing before they go to print, because he feels the information is too urgent to wait. His book Herbs for Pets, co-written with Mary Wulff, is considered a foundational reference in the field and is available through Animal Essentials. You can also find the Animal Essentials product line, including the original detox formula that started it all, at animalessentials.com.

Listen to the full episode on The Pet Parenting Reset with Greg Tilford here.