Question

I've been reading about omega-3 supplementation with great interest. Where can I get information as to what might be an appropriate amount of fish oil or flax oil to supplement an 1,100-lb (500-kg) 11-year-old Morgan gelding ridden about five hours each week?

Answer

Most of the research done with fish oil in horses used between 30 and 60 ml of fish oil per day. From this, researchers came up with a recommendation of 1 to 2 ounces (30 to 60 ml) per day. For the average horse without serious issues, the lower dose should be adequate. The higher dose is recommended for horses with joint problems, allergies, or insulin resistance.
I would recommend EO-3 from Kentucky Equine Research. The product has been researched thoroughly, and is made from fish oil, a rich source of omega-3 fatty acids.

Just in case you’re interested in more information on the use of fish oil in horses, here is a great resource.