Abstract
The influence of feeding a high concentrate diet and of different types of floor surface on the prevalence and severity of haemorrhages of the sole horn was studied in 60 Swedish Friesian heifers during early pregnancy For 4 weeks, out of a total observation period of 17 weeks, half the animals were offered 6.5 kg/day of concentrates while the others were fed a standard diet consisting mainly of roughage. Half the animals were kept on rubber mats and half on a concrete floor. The hooves were trimmed and the soles were photographed at the start and at the end of the experiment. The photographs were evaluated, each claw was scored for sole haemorrhages, and the total score for all 8 claws was calculated. No differences were observed between the groups in the scores of sole haemorrhages at any trimming. The scores were significantly higher at the first than at the second trimming, probably as a consequence of an abrubt change of floor surface 2-3 months before the first trimming. The study provides indirect evidence that events relating specifically to calving are likely to be crucial risk factors for sole haemorrhages and laminitis.
Keywords: concentrate diet, concrete floor, foot disease, rubber mat
Sammanfattning
Inverkan av utfodrιng med en hög kraftfodergιva och olιka båspallsunderlag på förkomsten och graden av sulblödnıngar studerades hos 60 SLB-kvιgor ι tιdig dräktιghet. Under en 17 veckors observatιonsperιod gavs hälften av djuren under fyra veckor en daglig kraftfodergιva bestående av 6,5 kg spannmål samt grovfoder medan övrιga djur erbjöds en normalfoderstat huvudsaklιgen bestående av grovfoder Hälften av djuren var uppstallade på gummιmatta och hälften på betong-båspall. Klövarna på samtlιga djur verkades och klövsulorna fotograferades i början och slutet av försöket Klövbilderna bedömdes och sulblödningar på varje klövhalva poängsattes varefter poängen från de 8 klövhalvorna summerades och angavs som sulblödnmgspoäng Inga skιllnader kunde iakttagas mellan de olιka grupperna vιd någon av verknιngarna. Sulblödnιngspoängen var högre vid första verknιngen an vιd den andra, troligtvis som en följd av en plötslιg ιnställnιng tιll betongspalt 2–3 månader före den första verknιngen. Resultaten utgör indιrekt en ιndιkatιon på att kalvnιngen ι sιg är en huvudsaklιg rιskfaktor för sulblödnıngar och fång.
Full Text
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Acknowledgments
The investigation was supported by the Swedish Council for Forestry and Agricultural Research and by the Swedish Farmers' Foundation for Research.
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