Moreover, no differences in casein fraction profile between milks from both
groups were found while the casein index was greater (P = 0.034) in milk from ewes fed CHE than milk
from ewes fed C. As regard fatty acid composition, milk from CHE group had a greater concentration of
omega-3 fatty acids if compared to milk from C group (alpha-linolenic acid: 2.18 vs 2.57 g/100 g of total
lipids in C and CHE group, respectively), whereas the percentage of CLA and of C18:1 trans11 in milk fat
from CHE group was smaller (CLA: 2.20 vs 1.85 g/100 g of total lipids, in C and CHE group, respectively
with P = 0.001; C18:1 trans11: 3.89 vs 3.57 g/100 g of total lipids in C and CHE group, respectively with
P = 0.001). The use of practical doses of CHT in the diet of grazing ewes may improve the response to
dietary linseed supplementation, resulting in milk with a greater concentration of alpha-linolenic acid.