Calming supplement for a horse thats great to ride, but anxious on the ground?
A regular herbal supplement is Dodson and Horrels Placid, this is full of calming herbs and can take a slight edge of a spirited horse, it is completely legal, it is about £15 for one tub. I feed a lot more than recommended. Nupa Fed is fed daily and is also given inaddition in syringe form on competing days, or just for hacking if necessary. This is expensive but does work. It is completely legal for FEI competitions. The recommended doses work. These two are the only ones I have found that work, without resorting to heavier stuff, ACP etc. A new idea is that magnesium is a calmer, so any supplement with that in may work as well.
A calming supplement will not help the problem entirely. There is no supplement out there that can help with your horse's nerves. He's not confident. It's in both of your best interest to do a lot of ground work! Ground work is the best way to go. Some horses are just anxious on the ground. It can be fixed, but using a supplement is not a good route to take.