Could this be thrush?

[ahlam1399]

Horse lives out 24/7. Some bits of field a bit boggy, must mostly dry. Went up this evening, horse short on left hind. Not lame just more short/a bit uncomfortable. I had a good look at hooves etc, and noticed a black patch in the collateral sulcus after i?d Picked her hooves out. No heat in leg or hoof, and hoof does not appear bruised. I?m not sure if the black bit is normally there or not. It doesn?t smell either. I unfortunately don?t have any photos.There is a chance it could be an abscess, and the horses were farting around in the field yesterday, so could also have done something a bit stupid. However, does it sound like it could be thrush?I?ve had horses a long old time, and I?ve never seen a case of it before.

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