He had been trying to find a way to make life easier for horse owners on livery yards who are unable to regulate their horse's management and are forced to turn horses out at unsuitable times (eg during the day onto Spring grass) with all the hoof problems that result from that.
Its a really common complaint both from owners and on the online forums, and its one that I think we can all sympathise with.
Do you stay on a yard where most aspects are great, but grass management is not? If you stay, chances are you will need to keep your horse shod or use hoof boots for part of the year - not a disaster, but frustrating if you want your horse to have the healthiest possible feet.
Often, people look for a magic bullet - something that they can feed, perhaps, which will miraculously allow them to turn their horses out 24/7. After all, its easier for owners to do that, and unless the weather is very warm, most horses enjoy being able to stuff their faces with green grass all day - much like most people don't object to sitting on a sofa and eating biscuits ;-)
The problem is that the magic bullet doesn't exist - one of the tough things about barefoot is that you are forced to recognise that unlimited UK grass is a huge health challenge for most horses' hooves.
Rather than trying to address the symptoms - the ripples on hooves and the evidence of footy horses - shouldn't we be trying to solve the underlying cause? Of course there are many livery yards which will dig their heels in and refuse to recognise what is happening, but many yard owners simply have no idea what they are seeing in hooves and may not realise how much healthier they can be when grass is managed more effectively.
From a grassland management point of view, fields are much more productive and in better heart, too, when horses are kept on tracks for at least part of the time.
Who knows? in 10 years time it may be common place for the best livery yards to have track systems, but it will only happen if horse-owning customers start asking for it and explaining the benefits.