Hoof question what is this???

[Holidays_are_coming]

Ok I have a new horse who has been barefoot all his life, I've changed his diet but he was non low starch food anyway (pretty much a barefoot diet) and I have put him on Pro Hoof. I have been increasing his work load on the roads slowly, and his hinds are looking fab. But his fronts ahave this on it??? Any ideas what it is and if I should be worried?

 

[NellRosk]

My horse had something very similar and it was an abscess exit point. It just grew down and flaked away and didn't cause her any issues.

 

[Kikke]

Looks like an old abscess growing out.

 

[Holidays_are_coming]

Brilliant thanks it just looked a bit wierd!!!