TRM Gastrofos Pellets Horse Supplement, 22-lb

$249.99 First Time Autoship Price
this order
Save 35% (up to $20) today when you set up Autoship. 

$269.99 Autoship Price
future orders
  • Get deliveries on your schedule
  • Skip, change, or cancel anytime
$269.99 Chewy Price
($12.28 /lb)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card + Free Shipping with code: WELCOME

In Stock
FREE delivery
Arrives between Jan 24 and Jan 31
Free 365-day returns

No interest if paid in full in 6 months. .

About This Item

Details

  • Gastrofos is specially formulated to boost digestive health in horses.
  • Helps relieve symptoms of ulcers, loss of appetite, and acid reflux.
  • Calcium carbonate and magnesium hydroxide act as antacids to improve stomach pH and neutralize ulcer-causing acids, while seaweed meal shields the upper stomach from acid splash.
  • Threonine and glutamine peptides aid in the healing process of ulcers by promoting mucus production and repairing damaged stomach lining.
  • Provides essential nutrients for overall health and vitality in a palatable form.

Ingredient Information

Feeding Instructions

Questions & Answers

Be the first to ask a question.

4.2
Rated 4.2 out of 5 stars
5 Ratings

5 Customer Reviews



Rated 5 out of 5 stars
By clarkosteo on Nov 5, 2025
Received Free Product

Palatable + essential amino acids

I love that this gives my horses some extra essential amino acids, especially L-Threonine and magnesium. I have also been feeding this to my PPID/Cushings horse

I love that this gives my horses some extra essential amino acids, especially L-Threonine and magnesium. I have also been feeding this to my PPID/Cushings horse for the past few weeks and it has been great. I mix it with their pelleted feed and they eat it just fine, so it must be palatable enough. As an equine scientist and nutritionist, I give this supplement a thumbs up!


Rated 4 out of 5 stars
By Cathy n Hamish on Nov 4, 2025
Received Free Product

Helps keep her satisfied it seems

I have 2 horses, but they are currently in a field with 2 others, so everyone has tried the Gastrofos. 3/4 like it, 1 has always been very picky and she didn't like

I have 2 horses, but they are currently in a field with 2 others, so everyone has tried the Gastrofos. 3/4 like it, 1 has always been very picky and she didn't like it and will not eat it at all. The other 3 horses do seem to like it, our horse is a senior horse over 30. She struggles eating in the Florida heat, so this feed seems to be an ok supplement to keep nutrients in her body. So far there have been no ill effects, it's been about 1 week.


Rated 5 out of 5 stars
By Britt on Nov 1, 2025
Received Free Product

My horses love. Great ingredients, great product!

The smell is a sweet with earthy tones. My horses had no problem eating them when added to their food. The pellets are a nice size and the bucket is easy to open

The smell is a sweet with earthy tones. My horses had no problem eating them when added to their food. The pellets are a nice size and the bucket is easy to open and close tightly. I look forward to continuing this supplement.


Rated 4 out of 5 stars
By Minj on Nov 23, 2025
Received Free Product

Good for my older horse

Had to wait to write a review for this one because I wanted to see how my horse did with it. Did not always want to eat it, but I figured out a way to mix it in

Had to wait to write a review for this one because I wanted to see how my horse did with it. Did not always want to eat it, but I figured out a way to mix it in his food and get him to eat it. Overall good experience with this.


Rated 3 out of 5 stars
By PickyEaterApproved on Dec 14, 2025
Received Free Product

Seems good

I can’t comment on how well it works yet since they are asking for a review pretty quickly after delivery. But my horse eats it just fine, granted he is not a picky

I can’t comment on how well it works yet since they are asking for a review pretty quickly after delivery. But my horse eats it just fine, granted he is not a picky eater.