Le mucche svizzere stanno diventando sempre più grandi, e questa evoluzione crea problemi nelle stalle e sui pascoli. Per questo motivo, un'organizzazione svizzerotedesca si batte ora per promuovere una "nuova vacca svizzera". Molte bovine elvetiche, infatti, sono diventate troppo pesanti per le fragili praterie alpine, troppo voluminose per le stalle - costruite 25 o 30 anni fa - e troppo voraci per i contadini. Alcune superano ormai il metro e 60 di altezza e pesano più di 800 chili.
"La taglia delle mucche aumenta annualmente in media di 0,3 centimetri, questa tendenza va fermata", ha spiegato Markus Gerber, presidente della società cooperativa di allevatori Swissherdbook. Le quasi 700'000 vacche svizzere producono annualmente in media 7'500 litri di latte, ossia il doppio della quantità registrata negli anni Sessanta.
La Comunità di interessi "Nuova vacca svizzera" consiglia, per l'inseminazione, tori che danno vita a mucche più piccole, più frugali e più sane. Un peso tra i 500 e i 600 chili per una taglia tra gli 1,40 e 1,45 metri sarebbero buoni valori, ritiene l'associazione.
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