Abstract
Abstract A study of plumage condition in 4032 Babcock B-300 Single Comb White Leghorn layers (SCWLs) with untrimmed beaks was carried out. Six conventional cage batteries were used, three with solid side partitions (S) and three with welded wire mesh partitions (M). Corrections for moderate differences in cage floor space per hen were carried out. The same, altogether 280 birds per treatment (S and M), were visually scored according to a 4 point scale at 35, 52, 64 and 81 weeks of age for plumage condition of neck, breast, back, wings and tail. The points of these scores were added to give a total score for the whole body. In S-birds there was significantly less deterioration of plumage compared to M-birds until at least 64 weeks of age regarding the sum of the individual scores. The effects on individual parts of body were different. Neck and breast feathers were not significantly affected. Wing plumage was significantly better in S until at least 64 weeks of age. Plumage on back and tail was significant...
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