Moulds and mites can build up in feed bins especially where condensation forms or where feed is delivered warm.

Bins should be cleaned and, ideally, washed out twice a year as long as they can be dried out before next feed delivery, he says. A biannual treatment with a mould inhibitor is also helpful.

He advises checking for accumulated mouldy feed in the inlets and outlets of augers. Periodically, as a routine, producers should run feed bins nearly out and regularly check them for leaks and structural integrity.