Horse Muscle Development Supplements

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Ship speed applies to in stock items, pending location. Does not include personalized items like engraving, embroidery, SmartPaks, or PortionPaks. Complete details on our Shipping Policies page.

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All of our supplement and product expertise is just a text away. Ask questions, manage your account, and place orders by texting 26756* from your mobile phone. Have a great ride!

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Monday – Thursday 9:00 am – 5:00 pm EST
Friday 9:00 am – 3:00 pm EST

*By texting 26756, you're giving SmartPak your consent to text you to help resolve your issue, including automated replies, at the number you provided. To opt out, text STOP to 26756. Text HELP to 26756 for info. Msg&rates may apply. Consent to receive texts not required to buy products. Terms & conditions and the full Text Message Privacy Policy can be found at https://www.smartpakequine.com/content/2waytextTC in case you're interested.

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Supplement Wizard

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What are SmartPaks?

SmartPaks are custom made, pre-measured daily dose paks of your horse's supplements

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SmartPak Manager

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Putting your horse's supplements on AutoShip helps you take great care of your horse, so we take great care of you with SmartPerks! When you order your horse's supplements on AutoShip, you're automatically* eligible for our FREE SmartPerks benefits, including:

Free shipping every day
10% off all Smartpak brand tack, apparel, and gear
A free Team SmartPak calendar, exclusive email offers and discounts, and more!

Learn more about SmartPerks

*At least one individual AutoShip supplement or horse's SmartPaks must be over $40. Some exclusions apply.
Visit SmartPak.com/SmartPerks or call 1-800-461-8898 for details.

Qualifying Items

Qualifying items are eligible for free shipping, every day. Look for the badge below on the product page to confirm that your item ships free!

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Ride Along Items

Ride Along items are eligible for free shipping when shipped with your next AutoShip order or any qualifying item. Look for the badge below to identify a Ride Along item.