My old girls love this feed! Great for putting condition on.
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Give your horse the edge with Harvest Grains MegaBuild® — a balanced muesli with tasty calories and essential nutrients designed to enhance topline, shine, condition, and overall wellness.
✅ What Harvest Grains MegaBuild® Delivers:
Balanced vitamins & minerals for strong metabolism
Maintains hemoglobin & overall health
Packed with omega 3 fatty acids and essential amino acids including lysine & methionine for muscle growth and recovery
Biotin for hooves & coat, chromium for metabolic support
✅ Why Choose Harvest Grains MegaBuild®:
Builds muscle strength and speeds up recovery
Glossy shine, and condition for that show ring glow
Ideal for sport, showing, and Ready 2 Run prep
Perfect for sale ring presentation
Great for youngsters and seniors alike
Supports horses in spelling or agistment
Loved by fussy eaters
MegaBuild is formulated to be fed dry and does not require soaking. However, numerous cases have shown that hydrating feed may support improved digestion in some horses. MegaBuild offers flexibility and can be fed dry and wet.
1️⃣Mix with Coco Mash for gut health, cool conditioning and weight gain.
2️⃣Mix with Pink Mash for gut health and maintenance.
⚖️ A mineral supplement may be necessary when using the lower rate as a guide.
📊 Nutrient levels of all supplements you currently add to the feed should be factored in before you start. Ask for professional guidance if unsure!
|
Horse weight |
Agisting/showing |
Light work |
Moderate work |
Heavy Work |
|
|---|---|---|---|---|---|
|
200kg |
0.5 - 1.5kg |
0.5 - 1.5kg |
1 - 2kg |
1.5 - 2kg |
|
|
300kg |
1.5 - 2.5kg |
1.5 - 2.5kg |
2 - 3kg |
2.5 - 3kg |
|
|
400kg |
2 - 3.5kg |
2 - 3.5kg |
3 - 4kg |
3.5 - 4kg |
|
|
500kg |
2.5 - 4.5kg |
2.5 - 4.5kg |
4 - 5kg |
4.5 - 5kg |
|
|
600kg |
3 - 5.5kg |
3 - 5.5kg |
4.5 - 6kg |
5 - 6kg |
barley, lupin, faba, pea, sunflower, extruded canola (non gmo), HG Supreme Pellets™, HG Omega Oil® (high in omega 3 fatty acid), HG Mineral Vitamin Premix™, HG Gut Conditioner™, sea salt (organic certified).
CProtein 14%, DEnergy 12.4MJ/kg, lysine 7g, calcium 6.5g, phosphorus 4.7g, copper 43.3mg, zinc 94.6mg, organic selenium 0.38mg, manganese 70.5mg, iodine 1.29mg, Iron 164mg, sodium 2.7g, chloride 5.4g, magnesium 3.8g, potassium 8g, vitamin A 5003.2 IU, vitamin D 1536 IU, vitamin E 531.35 IU, vitamin B1 12.8mg, vitamin B2 5.1mg, niacin B3 71mg, vitamin B5 15mg, vitamin B6 9.3mg, folic acid 2.9mg, vitamin B12 50μg, biotin H2 0.5mg, chromium 0.13mg, vitamin K3 1mg, omega 3 5600mg, omega 6 4300mg
Shipping & Pickup Information
Flat Rate Shipping via Post Haste (Excludes Feed):
Feed Shipping per bag via Post Haste:
Orders placed before 1 PM are usually shipped the same day.
Click & Collect - Tauranga Store
Free 24/7 pickup from our secure after-hours collection box. Email us if you’d like to collect after hours and we’ll send you the instructions.
Try Before You Buy - No Obligation
We keep limited stock in-store, so order online to secure the items you want to try.
At checkout, choose Click & Collect as your delivery method, then Cash on Delivery (COD) as your payment method. You won’t pay anything online.
We’ll bring your items into the store and let you know when they’re ready. Try them on or check them over in person. If they’re not right, leave them with us. No problem at all. If you keep them, pay in store when you pick up.
Excludes saddles.
No problem! We offer 30-day returns and exchanges on items in new, resalable condition with original packaging. Returns are issued a full store credit, or a refund less a 10% processing & restocking fee. See our full policy.
All your questions, answered.


Not sure what rug your horse needs right now? Our free Horse Rug Forecaster checks your local weather and tells you what rug weight your horse needs today, tonight and over the next 3 days. It works anywhere in New Zealand and adjusts for clipped horses and horses that feel the cold.
The thermoneutral zone is the temperature range where the body can maintain its core temperature with little to no extra energy expenditure. Humans need it much warmer, at around 25–30 °C, but for horses it’s much broader at 5–25 °C.
This difference means we should avoid rugging horses based on how cold we feel. Over-rugging can lead to serious health issues, including metabolic problems and thermoregulatory dysfunction.
Clipped horses may need a heavier gram fill to stay comfortable.
Remember: horses warm themselves more easily than they cool down under a rug. If unsure, choose a lighter rug.
Check your horse regularly to make sure they are neither too hot nor too cold.
Consider your horse’s age and natural ability to stay warm.
As a general guide, a healthy unclipped horse with shelter usually doesn't need a winter rug until it feels colder than about 5 °C, but always adjust for your horse’s individual needs.
Always ensure rugs are waterproof. A wet rug is worse than no rug at all.
This is an indicative guide only. Always take into account factors such as wind chill, your horse’s age, weight, and condition. For advice based on your local forecast, try the Horse Rug Forecaster.