A common case in horses during winter/wet months with horses on high sugar and starch diets.
Clean and dry footing available for the horse, a diet low in sugars and starches will assist in clearing up thrush cases in combination with some topical treatments.
The thrush has eaten away a hole in the central sulcus
Hoof abscess in combination of thrush
Long feet and shedding soles
During the summer months horses built up sole and due to the dry and hot weather they don't shed. Once it rains the sole gets soft and is ready to shed