Articles | Volume 69, issue 4
https://doi.org/10.5194/aab-69-643-2026
https://doi.org/10.5194/aab-69-643-2026
Original study
 | 
09 Nov 2026
Original study |  | 09 Nov 2026

Effects of individual versus pair housing during the first 15 d on pre-weaning growth performance and hair cortisol concentrations in dairy calves

Şevval Alsaç, Beyzanur Aköz, and Erkan Pehlivan

Cited articles

Aghaei, M. J. M., Yazdi, M. H., Kazemi-Bonchenari, M., and Mirzaei, M.: Effects of social contact (individual vs. pair housing) and weaning age on growth, health and behavior of Holstein calves fed intensified milk feeding program, Anim. Feed Sci. Tech., 331, 116590, https://doi.org/10.1016/j.anifeedsci.2025.116590, 2026. 
Bates, D., Mächler, M., Bolker, B., and Walker, S.: Fitting Linear Mixed-Effects Models Using lme4, J. Stat. Softw., 67, 1–48, https://doi.org/10.18637/jss.v067.i01, 2015. 
Bolt, S. L., Boyland, N. K., Mlynski, D. T., James, R., and Croft, D. P.: Pair housing of dairy calves and age at pairing: Effects on weaning stress, health, production and social networks, PLoS One, 12, e0166926, https://doi.org/10.1371/journal.pone.0166926, 2017. 
Bonney-King, J., Lindner, E. E., Bittar, C. M. M., and Miller-Cushon, E. K.: Pair housing benefits performance and activity of dairy calves with influences of season, J. Dairy Sci., 108, 11432–11442, https://doi.org/10.3168/jds.2024-25819, 2025. 
Broucek, J., Uhrincat, M., Kisac, P., and Hanus, A.: Effect of different rearing during the milk-feeding period on growth of dairy calves, Agriculture, 10, 346, https://doi.org/10.3390/agriculture10080346, 2020. 
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Short summary
This study evaluated whether individual or pair housing during the first 15 d affects pre-weaning growth and hair cortisol in Holstein calves. Housing treatment did not affect body weight or hair cortisol, but average daily gain varied by treatment over time. Sensitivity analyses supported the primary findings. Overall, early individual and pair housing produced no marked differences in pre-weaning growth or hair cortisol.
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