View Full Version : Soy in horse feed

Sep. 15, 2011, 11:07 AM
So how do I find out how much soy a horse feed has? I'm specifically interested in ration balancers.

Remind me again why soy is bad for some horses?


For example how do I compare Topline 32 http://www.kentfeeds.com/products/equine/equineChoice/equineChoice.php

To Purina Enrich 32

Sep. 15, 2011, 11:27 AM
It's much easier if you can see an ingredient list, which I can't find the for the Topline. But since I'm pretty sure it does have soy as its main protein source, and it's also 32% protein, then the amounts are bound to be very similar.

Soy *can* affect hormones, and some horses (and people) just can't take that.

Sep. 16, 2011, 01:29 PM
Soy can also depress thyroid function and is a main *irritant*for those that suffer from colonic or hind gut ulcers. Soy can supress progesterone and increase estrogen. 3 of my 5 were either sensitive or allergic to it.

Sep. 16, 2011, 02:14 PM
I have a few soy sensitive horses. But some of them can handle hulls and even soybean oil. It's the soybean meal that causes the issues with mine and since that is a common protein source if you're looking at a high protein feed and soybean meal is the first ingredient, that's going to account for a lot of it. You could always call the feed company and they may be able to give you exact figures or get you pretty darn close.

And not all horses have problems. I have two that don't have any issues at all. But both of their dams and the sire does. So apparently that little allergy at least isn't genetic in my herd.

Sep. 16, 2011, 02:33 PM
I have one that is sensitive to soy meal and apparently now hulls. Oddly enough, she was totally fine on it when she was pregnant and lactating (was getting Progressive Grass Balancer--can't take it anymore and now can't eat TC Senior).