Ok, I know that the reason for this "ring" is the major infection and most likely fever that I missed that my horse was fighting.  But this is the worst "fever ring" I have ever seen in my life.  It closely resembles a founder line.  It is deep at about 1/4 inch or a tad more.  Deep enough my index finger fits in the groove and in all four feet. 

her injury that caused the infection was in January, so this had to have happened end of January early February.  It has grown down about a half an inch now.  I didn't  ask my farrier about it when he was here last week putting shoes on her. 

I am wondering if it is gonna cause hoof issues as it grows down.  her feet aren't the biggest feet in the horse world and this ring will drop her down a size when we get to it, I feel. 

Right now, she is moving better than I have ever seen her move, not a missed step at all in conditioning work.  But am wondering possible complications down the road.

My first thought was that if it was a potential problem that your farrier would have given you a heads-up as soon as he saw it.  Call him to check just in-case but, as long as she seems to be running good, I wouldn't worry too much.  Her wall thickness must be fine if he just set shoes on her.

Put a call in to him, but they went out of town for the week.  If he doesn't call I will see him next Saturday as his wife hired me to judge a show for their open shows.  But this is up by the hairline still, so it may not be an issue for some time.

And the fact that my boarder showed up with another horse on shoeing day and ticked us both off, (horse was better this time, but tried to hurt my farrier pretty badly before which is why he was ticked it was brought back to him) we didn't have a "normal" day.  Usually he will talk to me about each hoof and each horse, but this last time he was quiet and just did his work.  I didn't notice it before he was out, so it wasn't until after he left and I was putting hoof dressing on that I even knew it was there.  Unusual for him to not say anything, but it was just not a good day, and I know we all have those.

I am gonna broach my farrier and vet about x-rays.  Just in case.  But right now she is moving great, and doing well, so hopefully it is just "blemish" thing more than a soundness issue. 

I am also wondering if when she was so anemic and was "eating" her muscle to try to build red cells, if she didn't draw from her feet as well and cause the rings.  The muscle finally came back, and the new growth is good on the hoof, so hopefully...