I find pure oils work much better compared to blended oils
Fish oil is the highest in Omega 6 & 3. Will help with weight and put a shine on them. Corn and Vegetable oils are not balanced in Omega fatty acids. My second choice would be Cocosoya oil but much more expensive than fish oil.
I’m trying to find this too however I have heard vegetable is bad for them as well as corn is bad
Vegetable oil is really good for coat and weight and stuff like that I use it for my mare.