Perfectly clear Lavinia. Really thank you for your time and expert information. It is a privilege to be helped like this 

María Durán.

It could be as straight forward as an overdue trim or bad trimming practices, esp. in large, heavy horses with big feet.

Bars are an integral part of the support structure of the feet. In a hoof that is structurally weak, they will tend to collapse/spread outward as the foot attempts to compensate for the overall lack of support from all the other structural members. They are attached to the walls /heels so when the walls pull away or run forward, the bars will be follow. In some ways, they can substitute for soles that are dangerously thin because they provide another layer of material between the outside world and the inside structures. As long as the foot is mechanically unsound, be restrained in how much you do with them. There will likely be bruising around/under them as previous damage grows out. Many laminitic/foundered/sunk horses find it more comfortable when their bars are much more substantial than what you would think is "textbook perfect". Listen to the horse.
 
If the foot has become relatively healthy - laminar connections strong, toes appropriate length, heels positioned properly, sole depth increasing with concavity appearing - then you will likely see them start to break off or crumble in places on their own. Help those areas along but don't be in a rush to remove too much at once. You can always go back and remove more but once you take too much, you may have a lame horse. Here's the link to one of Pete Ramey's articles on bars:

http://www.hoofrehab.com/TheBars.htm

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Lavinia

Moderator/ECIR Support

Hi again,

I thought it was better to separate issues. I would like to know the reason for laid bars, the damages if any of being laid and how to address them.

Thanks again to everyone 

María Durán
Madrid, Spain.