Hi can anyone help me, I have had my mare for 6 weeks now she has been seen by a farrier and he trimmed her frogs and put new shoes on, he has done a good job but yesterday I noticed on her back hooves where the frogs cones up between the heels, there are what looks like a couple of holes, on both of her feet, they are a few mm wide maybe the width of pencils, they seem deep and look like they go right into the frogs, I have honestly never seen anything like this on a horse before, there is no discharge, no heat she is not lame, and there is no smell, but any hole in the feet scares me especially with all the mud lately, she may get infections?? Can anyone help with what this is, the farries hasn't seen them but says some horses just have poor frogs and they can get holes, normally something has worked it's way out (but not sure how this happens on both at once) basically he said if she is not in pain and not lame don't worry, but I am terrified, please help...