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Prevalence of sole haemorrhages (including sole ulcers) of different severity score (0 = none, 1 = mild, 2 = moderate, 3 = severe) in first-calving heifers (cohort 1 and 2) at spring trimming in Year 2 in different flooring systems (slatted concrete (Hard 2) or slatted rubber mats (Soft 2)) coming from either deep straw bedding (Soft 1) or cubicles (Hard 1).
