I have recently brought home my 35 year old retired horse and found out that her hooves are terrible! I am looking after both of my other horses feet so I know what to do with the incredibly high heels. What I have no idea what to do with is the outsides of her walls. All around the bottom edge of all four hooves, there are what look like layers, and the top layer is much further up from the rest, it seems like the top layer of wall is splitting away. There is blackness between every layer I'm not sure if it is mud or rot. I have filed down as much as I dare but there are still those black lines. Also there are big chunks missing from the outside of her left front and back wall.
I hope I have described it well enough! Please help if you can I am really lost!