I fed my part Arab Dodson and Horrells suregrow then moved onto their ultimate balancer when he didn't need the calories and now doesn't even need that so gets d&h vitamin and mineral supplement which is a small pellet with a handful of chaff
It's for the ulsakind cubes not a balancer. If you're feeding a balancer then 550g sounds about right, I think most balancers are fed at rates about 100g per 100kg.
I had a very expensive treeless that initially was good and we were both happy with (about a year or so) but then my horse changed shape and despite changing to a different model it gave my horse a sore back to the point I had the approved fitter and physio every 8 to 10 weeks and virtually...
I've used Winergy Ventilate on two horses, one is sensitive to dust, the other would otherwise have been given ventipulmin. It worked well on both and all symptoms went when using it.