Gave Chicy a bath today. Afterwards I noticed her coronary bands looked white snd mushy. I ran my finger lightly on the front and some white mushy stuff was on my finger. I then took a picture of a rear foot as it has never had a boot.  Is this associated with pregnancy or PPID?
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Janet and Chicy
Chester SC
09/17/2021
https://ecir.groups.io/g/CaseHistory/files/Janet%20and%20Chicy
https://ecir.groups.io/g/CaseHistory/album?id=268334

It sounds like oversoftening from constant moisture.
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Eleanor in PA

www.drkellon.com 
EC Owner 2001

Her stall is dry. Gets cleaned 6 times daily. Dry lot is dry too except for 1 early morning rain a couple of days ago. She is now in a stall and no access to dry lot but can go into hallway of barn to visit with other horses in the dry lot at back of barn. 

They look fine today. I had a mare many years ago who was in foal and her coronary band separated from hoof in areas. I was told by my vet at the time ( different part of country than I am now) that he had seen that in other bred mares but it never created any problems. He said the baby utilizes nutrition that normally go to the mares feet so he felt that is what was going on. This was about 30 years ago.  I am sure we know more now than then. 
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Janet and Chicy
Chester SC
09/17/2021
https://ecir.groups.io/g/CaseHistory/files/Janet%20and%20Chicy
https://ecir.groups.io/g/CaseHistory/album?id=268334

I was talking about condensation in boots, assuming your boots cover the CB. The most common cause of an opening is abscess drainage. Assuming there's no autoimmune disease, laminitis or selenium toxicity are other causes. It's not from the pregnancy stealing nutrients from the feet, although pregnant mares have special nutritional requirements for both their own and the foal's health and strength. There's no excuse for deficiency problems.
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Eleanor in PA

www.drkellon.com 
EC Owner 2001