Fiteen cows colostrums and milk sample were analyzed for concentrations of total immunoglobulins(IGS), immune-globulin (IgG, IgA and IgM), percentages of dry matter (DM.), fat, and protein, somatic cell count (SCC) and microbiological culture goal. Colostrums and milk were sampled from each cow as soon as possible after parturition, at 3rd and 7th day postcalving.
The study revealed that the chemical composition of cows colostrums changes very fast within hours and days. The concentrations of total Igs, IgG, IgA and IgM were decreased from 7.3, 6.26, 0.414 and 0.20 gm/dl at parturition to 1.9,,1.06,0.16,,0.15 gm/dl at 3rd day. While at 7th day were 0.09, 0.060, 0.009 and 0.005 gm/dl respectively.
Percentages of colostrums and milk DM, fat and protein were reduced from 23.4, 6.7 and 14.22% at parturition to 16.4 and 5.5% at 3rd day to 14.3, 4.23 and 3.1% at 7th day postcalving , respectively.
The fore milk somatic cell counts were significantly higher than milk sample along procedures from 1.1 to 5.5. the counts of coliform, staphylococcus and enterococci in colostrums and milk sample were lowered from and respectively.
It concluded that adaily decline in nutritional contents of colostrums and milk take places. Hence newly born calves must be fed on colostrums within the first days of their life due to its high quality.