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Author

M. Guenther

4 papers indexed here

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Open access Sep 2026

Supplementation of Rumen-Protected Methionine to Heat-Stressed Transition Cows Impacts Mammary Gland Cell Dynamics and Gene Expression

Simple Summary Dairy cows undergo physiological changes around calving as they shift from non-lactating and pregnant to lactating. Heat stress during this time intensifies these challenges by reducing intakes, weakening the immune system, lowering fertility, and decreasing milk production. As global temperatures rise,...

B. D. Davidson, M. Guenther, Julie Duclos et al. · 0 citations
Open access Oct 2026

Impact of heat stress abatement and milk replacer feeding programs on thermoregulation, health, and growth performance of dairy heifers during a subtropical summer.

Early-life management, including nutrition and environmental modifications, can shape calf health and performance. We examined the effects of 2 different milk replacer (MR) feeding programs with and without heat abatement in Holstein heifers during a subtropical summer. Holstein dairy heifers (n = 167, BW = 36.6 ± 0.6...

C. G. Savegnago, Y. B. Amancio, J. Gao et al. · 0 citations
Open access Sep 2026

Effect of in utero heat stress on neonatal small intestinal cell turnover, and markers associated with barrier function and immunoglobulin G transport in newborn dairy heifers.

Late gestation heat stress in dairy cows reduces offspring's capacity to absorb colostrum immunoglobulin G (IgG). This study evaluated small intestine histomorphology, cellular turnover, and gene expression profiles of in utero heat stressed versus in utero cooled heifers at birth. For the last 54 ± 5 d of gestation, p...

M. Guenther, B. D. Davidson, L. Cangiano et al. · 0 citations
Open access Aug 2026

In utero hyperthermia impacts the histological and transcriptomic signature of the mammary fat pad of newborn heifers

Development of the mammary gland begins in utero and requires coordinated interactions between the epithelial rich parenchyma and the surrounding mammary fat pad (mFP). In this study we investigated how maternal heat stress (HS) during gestation impacts the development of the offspring mFP. Mammary fat pad tissue...

M. Guenther, B. Dado-Senn, M. Myers et al. · 0 citations

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