Respiratory stress is a common fact of life for the modern horse. Stabling, forage and indoor schools can all harbour dust and fungal spores which accumulate in and irritate the sensitive lining of the lungs and respiratory tract.Respiratory stress is a common fact of life for the modern horse.Respiratory stress er en almindelig del af livet for den moderne hest.Stabling, forage and indoor schools can all harbour dust and fungal spores which accumulate in and irritate the sensitive lining of the lungs and respiratory tract.Stalde, foder og indendørs ridebaner kan alle indeholde støv og svampesporer, som ophober sig i og irriterer den følsomme foring af lungerne og luftvejene.