caa a22 4500 386320071 CHVBK 20180307111622.0 cr unu---uuuuu 161130e198810 xx s 000 0 eng 10.1017/S0003356100003263 doi S0003356100003263 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100003263 The influence of dietary protein intake and of hoof trimming on lameness in dairy cattle [Elektronische Daten] In an experiment during weeks 3 to 26 of lactation, two groups of 12 cows were offered a mixed concentrate/grass silage diet containing 161 g crude protein per kg dry matter, and two similar groups a diet containing 198 g crude protein per kg dry matter. The concentrate: forage ratios and the daily metabolizable energy intakes were the same for all four groups. The cows in one of the two groups at each crude protein level had their hooves trimmed prior to parturition, the other group remaining untrimmed. The high protein diet significantly increased locomotion score (higher scores indicate poorer locomotion), the number and duration of clinical cases of lameness and outer toe length. Trimming of hooves reduced locomotion scores and the number and duration of clinical cases. Hoof growth was significantly increased by trimming. Mid-sole hardness was negatively correlated with locomotion score. At the two extremes, the low protein trimmed group had five cows lame for an average of 1·0 weeks, whereas the high protein untrimmed group had nine cows lame for an average of 4-2 weeks. Condition score and live-weight change were negatively correlated with locomotion score. There were no significant differences between treatments in milk solids yield. Copyright © British Society of Animal Science 1988 Manson F. J. West of Scotland Agricultural College, Crichton Royal Farm, Dumfries Leaver J. D. West of Scotland Agricultural College, Crichton Royal Farm, Dumfries Animal Production Cambridge University Press 47/2(1988-10), 191-199 0003-3561 47:2<191 1988 47 ASC https://doi.org/10.1017/S0003356100003263 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100003263 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Manson F. J. West of Scotland Agricultural College, Crichton Royal Farm, Dumfries NATIONALLICENCE 700 1- Leaver J. D. West of Scotland Agricultural College, Crichton Royal Farm, Dumfries NATIONALLICENCE 773 0- Animal Production Cambridge University Press 47/2(1988-10), 191-199 0003-3561 47:2<191 1988 47 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge