What kind of supplements?

What kind of supplements, if any, would you give a 5 year old gelding that is going to be ridden 3-5 days a week and is going to be trained for dressage and/or hunter jumper?

You could give some kind of joint supplement to support his joints. And maybe probiotics/prebiotics in case the training gets a little stressful. That would be my suggestions.

You could also go to SmartPak.com and try out the supplement wizard. It asks a bunch of questions and gives recommendations of what supplements you might be interested in. Of course you don't need every supplement the suggest. But it is kind of nice to see what to give and how much monthly supplements may cost too

Oh thank you! I forgot smartpak did that. :)