In this study, the important term of "Days in Milk (DIM)", this is equivalent meaning in Turkish terms like "Sağımda Geçen Gün (SGG)” was emphasized in terms of dairy cattle. In this scope, it was expressed that averaged days in milk (???) should be 160-170 days in well-managed herds. However, it is emphasized that this value is about 250 days at some dairy cattle breeder’s conditions in Turkey and is in an undesirable level. It is expressed that it corresponds to a calving interval of about 1.5 years in Turkey dairy cattle breeders and that it corresponds to a calving interval of about 1.5 years in Turkey dairy cattle breeders and that milk yields of farms is below what it should be too.