The results of this project show that the fecal dry matter content was significantly lower in pasture-based animals than in barn-fed animals . Furthermore, it was striking that in the first two to four weeks after the feed change, the proportion of fecal fractions in the top sieve was higher, while that in the middle and bottom sieves was lower. This was observed in both the spring and autumn feed changes and suggests that the feed was less well digested in the first few weeks after the change .

also observed between pasture-based and short-grass-based systems . The forage from the short-grass-based system showed higher digestibility of organic matter and fiber than that from the pasture-based system. Furthermore, short-grass-based systems exhibited a lower fecal dry matter content, and fecal sieving revealed higher proportions in the top sieve and lower proportions in the middle and bottom sieves. This suggests that the digestive processes in the rumen were somewhat impaired by the sugar-rich and fiber-poor short-grass-based forage, even though the digestibility of the forage was higher than that of pasture-based systems.

Based on the available results, it is recommended that the feed transition be carried out as slowly and gently as possible. This means that even in the first few weeks after the start of full pasture grazing, roughage (e.g., in hay racks) should still be offered. Furthermore, it is advisable to begin supplemental feeding in the barn or via hay racks a few weeks before the animals are moved to their new housing in autumn. This ensures the gentlest possible feed transition without significant impact on the animal's digestive system.

Further information on fecal sieving: Fecal assessment of cattle