Foals born in summer are bigger than those born in winter. Credit: Juliane Kuhl/Vetmeduni Vienna.
Foals born in summer are bigger than those born in winter.

N&H TOPLINE: 'Winter foals' smaller than summer-born foals

Seasonal and diurnal rhythms determine the life cycle of many animal species, including livestock. In equids, this is true not only for wild species such as the Przewalski, but season-dependent metabolic changes also exist in domesticated horses.

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