Orla is back on the Happy Horse Nutrition Podcast, and this time she and Dr Nerida are answering listener questions, sharing stories from the behind the gastroscope, and chat themselves down a number of rabbit holes.

In this (very 😂) relaxed Q&A episode, Nerida and Orla talk about sand, gravel and soil in the gut, when psyllium may be useful, and why forage and fibre are so important for helping horses move dirt through the digestive tract. They also discuss the tricky balance between using haynets to slow intake, while still keeping horses comfortable, chewing and ulcer-free.

They answer a listener question about lucerne/alfalfa and whether it is actually too high in sugar for metabolic horses (spoiler alert, it's not but there are so many misconceptions!). Nerida explains why lucerne can be a useful low-NSC forage, and how it can help add protein, calcium and fibre diversity to the diet.

The conversation also wanders into fasting horses for gastroscopy, soaking hay, muscle cramping, potassium, PSSM and HYPP, because one good horse nutrition question always seems to lead to five more 🙈😄.

This is a fun episode with some useful info and interesting stories 💖

💛 If you enjoyed this episode, please follow the Happy Horse Nutrition Podcast and share it with a horse-loving friend 🙏🏼

📲 For help assessing your horse’s diet, download the MyHappy.Horse app ⁠https://apps.apple.com/au/app/myhappy-horse/id6633422324⁠.

🩺 And if you’d like to get in touch with Orla, [email protected]

What really happens inside an off-the-track’s gut when you take away the racing diet and start to rebuild the horse from the hindgut up?

In this episode of the Happy Horse Nutrition Podcast, Dr Nerida is joined again by Dr Belinda to talk all about Allay, Nerida’s daughter's beautiful off-the-track Thoroughbred mare, and what happened inside her gut as she transitioned from racehorse life into life after racing.

Allay’s story gives us a rare look at the hindgut microbiome in real life. Over her first 12 months with Nerida, her diet, behaviour, condition and microbiome were tracked, showing what can happen when an off-the-track horse is given time, fibre, forage diversity and the right nutritional support.

Nerida and Belinda unpack how Allay’s microbiome changed over time, why fibre comes first when rebuilding the hindgut, how forage diversity helps support microbial diversity, and why microbiome recovery does not always happen in a perfectly straight line.

They also talk about behaviour, manure, ryegrass curveballs, microbial resilience, and why feeding the microbes in the hindgut is such an important part of supporting the whole horse.

If you own an off-the-track, work with them, or simply want to better understand how the gut can influence condition, health, behaviour and long-term resilience 

🐎 To watch Allay's full story, see Allay: The First 12 Months 

📲 For help assessing your horse’s diet and building a balanced feeding plan, download the MyHappy.Horse App and let it help you feed with more confidence https://apps.apple.com/au/app/myhappy-horse/id6633422324

💖 If you find this episode helpful, please follow the Happy Horse Nutrition Podcast and  share it with a horse owning friend who is struggling with feeding their OTT.

🌟 And we'd love you to leave us a rating and review so more horse owners can find practical, science-based nutrition advice.

How much does broodmare nutrition really matter?

In this episode, Dr Nerida is joined again by Jess, an equine science student from Charles Sturt University, for a practical Q&A on feeding pregnant (and lactating) broodmares.

They unpack the idea of “feeding for two”, and why pregnant mares do not need large amounts of extra energy and protein from day one, but absolutely do need a balanced diet from the very beginning.

Nerida explains how nutrients such as copper, iodine, calcium, phosphorus, protein and lysine can influence foal development, joint health, milk production and mare condition. The discussion also explores lactation, foal growth rates, the importance of the mare’s microbiome, and why nutrition during pregnancy may have long-term effects on the foal’s health and future performance.

A must-listen episode for breeders, stud staff and horse owners wanting to give mares and foals the best possible start.

📲 Download MyHappy.Horse to help you keep broodmare diets balanced: https://apps.apple.com/app/myhappy-horse/id6633422324

🦠 And if you want to look into your broodmare’s microbiome, get in touch with EquiGI - https://www.equigi.com

Is your horse an “air fern” who seems to gain weight just by looking at grass?

In this episode of the Happy Horse Nutrition Podcast, Dr Nerida walks you through how to feed overweight horses and good doers for safe, sustainable weight loss, without leaving them hungry, stressed, nutritionally deficient or at higher risk of problems like gastric ulcers.

Weight loss for good doers is not as simple as “feed less”. In fact, restricting forage too harshly will create serious gut health, welfare and behaviour problems. Instead, Nerida explains how to reduce calorie intake while still keeping your horse chewing, happy and with all of their nutrient requirements met.

You’ll learn the five key steps to feeding horses for weight loss, including remove high-energy feeds, manage access to pasture and high quality hay, use low-calorie forages like mature grass hay and straw, balance vitamins and minerals correctly, and how exercise and winter can make such a difference.

This episode also covers practical tools for managing laminitis-prone , insulin-dysregulated , cresty-necked and easy keeper horses, including use of forage testing, slow feeders, track systems, controlled grazing and the importance of measuring body condition, body weight and cresty neck score over time.

If you have agood doer or an overweight horse that needs to lose weight safely, this episode will help you understand how to create a weight loss diet that protects gut health, supports the hindgut microbiome and keeps your horse (and you!) as happy as possible.

 📲 Download the MyHappy.Horse nutrition app to check your horse’s calorie intake and make sure your weight loss diet is properly balanced https://apps.apple.com/au/app/myhappy-horse/id6633422324 ⁠ 

💖 If you found this episode helpful, please follow the Happy Horse Nutrition Podcast and  share it with a horse owning friend who is struggling with getting their air fern to lose some weight!.

🌾 And here is Sammy Julliand’s work on hay assessment using the human senses https://www.sciencedirect.com/science/article/pii/S1751731118003725

Is your horse underweight, a classic hard keeper, or one of those horses who seems to need a ridiculous amount of feed just to hold condition? In this episode of the Happy Horse Nutrition Podcast, Dr Nerida takes a practical, gut-first look at feeding horses for safe, effective and sustainable weight gain.

Because weight gain is not simply a matter of “just feed more”. Yes, a horse needs to eat more energy than they use in order to gain weight, but they also need to be able to digest and use that energy. And that is where so many weight gain diets go wrong. If the cause of weight loss has not been identified, the hindgut is struggling, the diet is unbalanced, or the horse is being pushed too hard with high-starch feeds, owners can end up feeding more and more, while the horse still fails to thrive.

In this episode, Nerida walks through the five key steps to feeding for weight gain, starting with identifying why the horse is underweight in the first place. From there, she explains why the hindgut must become a fibre-fermenting powerhouse, why forage variety and fibre diversity matter, how to balance the diet properly, why high-quality protein is essential for building muscle and topline, and how to add high-energy ingredients like super fibres, oils and well-cooked grains safely.

Nerida also talks about something every owner needs to understand before starting a weight gain diet: higher-energy diets can affect behaviour. The aim is not to create a fire-breathing dragon under saddle. The aim is to build a healthier horse who can gain condition, support muscle development, maintain better gut health and eventually hold weight without relying on huge amounts of supplementary feed forever.

📲 For help assessing your horse’s diet and building a balanced feeding plan, download the MyHappy.Horse app and let it help you feed with more confidence. https://apps.apple.com/au/app/myhappy-horse/id6633422324

💖 If you find this episode helpful, please follow the Happy Horse Nutrition Podcast and  share it with a horse owning friend who is struggling with weight gain.
🌟And we'd love you to leave us a review so more horse owners can find practical, science-based nutrition advice.

Do calming supplements for horses actually work? Or are we sometimes asking them to do a job they were never going to be able to do?

In this episode, Dr Nerida takes a practical, science-based look at horse behaviour, diet and calming supplements. Before diving into ingredients like magnesium, vitamin B1 and tryptophan, Nerida starts with the bigger question every horse owner should ask first:

Why is my horse behaving this way?

Spookiness, tension, anxiety, reactivity, unpredictability and “too much energy” can all be signs that something deeper is going on. Too much concentrated feed, grain-based diets, raw or poorly digested grain, not enough forage, hindgut dysbiosis, gastric pain, riding on an empty stomach, mycotoxins, pain, lack of movement, lack of socialisation and unbalanced diets can all influence behaviour.

Nerida also explains why forage is one of the most powerful “calmers” we have for horses, why the hindgut and brain are so closely connected, and why behaviour should always be treated as information.

Then she looks at the evidence behind common calming supplement ingredients. Magnesium may help in specific situations, especially where magnesium intake or metabolism is compromised. Vitamin B1 may have a role, particularly when hindgut health is poor. But tryptophan? The research in horses does not support it as an effective calmer.

If you have ever reached for a calming supplement hoping it would fix a spooky, anxious or explosive horse, this episode will help you step back, look at the whole horse, and understand what may really be driving the behaviour.

Because calm does not start in the supplement aisle. 

💛 Download the MyHappy.Horse app to check whether your horse’s diet is supporting calm, healthy behaviour. https://apps.apple.com/app/myhappy-horse/id6633422324

🎧 Follow the Happy Horse Nutrition Podcast for more practical, science-based feeding advice

What do you feed a horse that can’t chew properly?

In this episode, Dr Nerida McGilchrist is joined by Jess, an equine science student from Charles Sturt University, for a practical Q&A on dental issues in horses and how they affect nutrition.

Using Jess’s own horse as a real-life example, they explore how to feed horses with unusual or compromised teeth, why forage still matters, when soaked hay may help, and how to balance dental comfort with laminitis risk.

Nerida also explains why old horses with worn teeth are so often underfed, how to think about chaff, hay cubes, beet pulp, copra and other fibre sources, and why a balanced diet is still essential when forage intake becomes complicated.

A useful episode for anyone feeding an older horse, a horse with missing or worn teeth, or a horse that needs a more creative nutrition plan.

📲 Download the MyHappy.Horse nutrition app: https://apps.apple.com/app/myhappy-horse/id6633422324

🧮 Monitor closely for laminitis with Lami-tag, as early detection is critical - https://www.lami-tag.com

🐎 Queensland Off The Track’s Feeding the senior OTT - https://www.youtube.com/watch?v=gxXOm7_7biM

🌾 Here is the key paper behind the discussion about oaten/cereal hay, water-soluble carbohydrates and equine peripheral dental caries. This study surveyed 500 Western Australian horses and found peripheral caries in 58.8% of surveyed horses, with oaten hay identified as a dietary risk factor. 

Jackson, K., Kelty, E. & Tennant, M. 2018. Equine peripheral dental caries: An epidemiological survey assessing prevalence and possible risk factors in Western Australian horses. Equine Veterinary Journal, 50(1), 79–84.
https://pubmed.ncbi.nlm.nih.gov/28707363/

What happens when a thoroughbred breeding farm reduces grain, increases forage diversity, and prepares yearlings with gut health in mind?

In this episode, Dr Nerida is joined by Zac Harris, a thoroughbred breeding farm manager preparing yearlings for sale, to talk about a very different approach to traditional yearling prep.

For years, many sales yearlings have been fed high-grain diets, often with limited forage diversity, in an effort to maximise growth, muscle and sale-ring presentation. But what if there is a better way?

Zac shares what happened when he changed the feeding program, focused more on forage and fibre, and paid closer attention to the horses’ appetite, manure, behaviour and overall wellbeing.

This is a hands-on conversation for anyone feeding young horses, preparing yearlings for sale, managing thoroughbreds, or simply wanting to better understand the link between diet, gut health and behaviour.

🌟 If this conversation made you think differently about feeding young horses, we’d love you to follow the Happy Horse Nutrition Podcast

🙏🏼 Please share this episode with someone who works with yearlings, thoroughbreds, or any horses that could benefit from a happier, healthier gut.

💛 And for more information about what we do here at MyHappy.Horse, go to https://www.myhappy.horse/

Winter can be one of the biggest challenges when feeding horses. So in this episode, Dr Nerida talks all things winter feeding. You’ll learn why preparation matters, that forage is your horse’s internal heater and why body condition scoring with your hands is so important during the colder months.

Nerida also covers winter weight loss, feeding good doers, choosing forage quality, fibre diversity for hindgut health, water and salt intake, balanced diets, vitamin and mineral support, protein quality, and why laminitis-prone horses still need careful management in winter.

Whether your horse is an older horse, an off-the-track Thoroughbred, a hard keeper, a broodmare, a growing horse, a good doer, or a horse prone to laminitis, this episode will help you stay one step ahead before winter feeding problems show up.

📲 Download the MyHappy.Horse app to check whether your horse’s diet is meeting their energy, protein, lysine, vitamin and mineral needs this winter:
https://apps.apple.com/app/myhappy-horse/id6633422324

💖 If this episode helps you, we’d love you to follow the podcast and share it with a horse-loving friend that has a horse who struggles through winter. 

We talk a lot about protein in horse nutrition, especially for topline, growth, milk production and gut health, but the number on the feed bag is only the starting point.

Two feeds can both say 16% protein on the bag, but they may not support your horse’s body in the same way.

In this episode of the Happy Horse Nutrition Podcast, Dr Nerida explains protein quality in horses and why the crude protein percentage on a feed bag only tells part of the story.

You’ll learn how amino acids work, why essential amino acids matter, and why lysine, methionine, threonine and the branched-chain amino acids are so important for muscle, topline, bone development, milk production, tissue repair and gut health.

Nerida also explains why protein source matters, using examples like soybean meal, whey protein, cottonseed meal, sunflower meal and forage quality, and shows how two feeds with similar crude protein levels can provide very different amino acid value to your horse.

Whether you have a growing horse, broodmare, performance horse, off-the-track Thoroughbred, senior horse, or a horse needing more topline or gut support, this episode will help you ask a better question: not just “how much protein is in this feed?”, but “is this protein good enough for the job I’m asking my horse’s body to do?”

📲 Download the MyHappy.Horse nutrition app to check your horse’s crude protein and lysine intake and build better, more balanced diets with confidence https://apps.apple.com/au/app/myhappy-horse/id6633422324

🐎 Queensland Off The Track Nutrition Hub is here https://www.racingqueensland.com.au/animal-welfare/off-the-track/nutrition-education-hub

💖 And you can find the story of Allay's first 12 months here: https://www.youtube.com/watch?v=KttwjBii2HY

⁉️ If you'd like help with interpreting your feed label's list of ingredients, email it to us, [email protected] or ask Dr Nerida AI https://www.myhappy.horse/nerida-ai

💛 Follow the Happy Horse Nutrition podcast for more practical, science-based horse nutrition, and we’d love you to share this episode with a horse-loving friend who wants to feed their horse with more clarity and confidence.