Home ‘Tying-up’ linked to genetics, training and feeding Tying-up, also known as Monday morning sickness, is a condition in which the muscles running over the hindquarter of the horse tightens up, causing severe cramping.

Tying-up, also known as Monday morning sickness, is a condition in which the muscles running over the hindquarter of the horse tightens up, causing severe cramping.

Tying-up, also known as Monday morning sickness, is a condition in which the muscles running over the hindquarter of the horse tightens up, causing severe cramping.

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