The milking preparation time of 1 minute is sufficient for good milk ejection for all animals regardless of lactation stage. The milk flow and milk production of the cow determine the milking time and have a significant impact on the efficiency of the milking parlour.Based on the data obtained from these observations and measurements, the efficiency of the 2 x 5 Herringbone milking parlor was calculated in the 12 observations expressed in kilograms of milk per milking station and per hour.As experience was gained and the milking routine standardized after 3 months, the amount of 50 kg of milk per milking post and hour was reached.A strict milking routine in which teats are cleaned and dried within 30 seconds and the application of milking units 60 seconds after the start of stimulation increases milk production by 450 kg per lactation and brings an extra 320 l/ cow/lactation.The access of the cows to the milking parlor was the activity for which long periods of time were recorded. Accustoming the animals to the new milking conditions took almost 3 months.The average access time of a series of 5 cows to the milking stalls decreased from 6.8-7.0 minutes recorded in the first 2 observations to 2.5 minutes in the last observation

The effect of manual stimulation on milking performance and on some parameters of milk production showed that the average milk production per milking was higher in animals with manual stimulation (12.3 kg) compared to the average milk production in animals without stimulation (12.0 kg).At the same time, the average time per milking in animals with manual stimulation was 4.8 minutes, and in animals without stimulation it was 5.3 minutes (in addition 0.5 minutes). The compositional quality was not affected by the two treatments. There were also no significant differences between the means of fat or protein percentages. The average number of somatic cells in the milk of animals with manual stimulation was 197,000 cells/ml, and in animals without stimulation of 246,000 cells/ml of milk. An increase of 49,000 cells/ml can be observed in animals without stimulation, the difference in this case being significant (p< 0.05). The higher number of somatic cells in unstimulated animals is the result of not removing the first milk jets that contain the highest load of bacteria and somatic cells.Regarding the milk flow, it is 2.56 kg/minute (average milking 1 + milking 2) in animals with stimulation and 2.26 kg/minute in animals without stimulation. The difference between the 2 means was + 0.30 kg/minute, being distinctly significant ( p < 0.01).Regarding the influence of the standard milking routine on milking performance and milk production parameters, it must ensure a uniform treatment for each cow, at each milking, regardless of the stage of lactation, the number of lactations or the person performing the milking. Almost 15-25% of the total milk secreted by the mammary gland represents residual milk, also called complementary milk. In the research carried out in the animals of the first group, residual milk represented 15.48% of the total milk produced by the mammary gland and 14.72% in the animals of the second group.The residual milk fat percentage was 9.38% in group 1 animals and 9.42% in group 2 animals.

The herd of Holstein cows, either daughters of cows inseminated with semen from non-pedigree bulls (control group) or daughters of pedigree bulls (experimental group), were randomly selected to be milked twice or three times a day. Amount of dry matter (DM), live weight (BW), milk production yield (FCM), milk fat content (FM) were recorded for two lactations. In general, cows in the experimental group produced more milk (P<.0l) than those in the control group and cows milked 3 times a day produced more milk than those milked 2 times a day (P<.0l). Actual milk production was greater (P<.0l) for both groups during the second lactation than during the first lactation. However, the average increase in FCM yield from the first to the second lactation was only about 12% for cows milked twice and 5% for cows milked 3 times. The experimental group of cows gave approximately 25% - 30% more milk during the first and second lactations than the control group cows. Dry matter consumed, regardless of body weight or milk fat percentage, was increased in the experimental group for milk yield. Milk production per DM unit was higher for cows in the experimental group than for the control group at 30, 90 and 200 days postpartum (DPP).Milking three times a day increased the total milk yield by 14% and 6% during the first and second lactation, respectively.

The highest frequency is on day 1 (after treatment) after which it gradually decreases. It should be noted that no antibiotic residues were detected in the collected milk samples prior to treatment. Antibiotic residues may be detected in the milk of recently calved animals due to intramammary treatments during the dry period (chronic mastitis). If the period after treatment is less than 15 days until calving, the frequency of detecting residues in milk after calving is high. As noted, there were two (10%) positive results, after the expiration of the waiting period, one in intramammary treated animals and one in intramuscular treated animals on the fourth day, the first day after the waiting period. The somatic cell count in the positive sample from intramammary treated animals was 2850000 cells/ml and 337000 cells/ml in the sample from intramuscular treated animals. The antibiotic residue test was influenced by the components of the milk with mastitis. From the analysis of the treatment register, it was found that the intramuscularly treated cow received an overdose of penicillin. This overdose resulted in a massive accumulation of penicillin in the animal’s body resulting in an extension of the elimination period by one more day.

The acidity of milk in batch I was the best of 18.66°T, in batches II and III the acidity had higher values ​​compared to the first batch and with the maximum requirements in force. The fat content in all the lots examined was satisfactory, having values ​​higher by 1.23 - 1.33% compared to the minimum requirements in force. In the examined batches, the protein content was in batch II of 3.5% or the minimum level according to the requirements in force and slightly higher in batch I - 3.66% and batch III - 3.67%. Among the components of milk, casein it is the component that ensures its coagulation under the action of enzymes. The casein content was the highest in batch III of 3.23%, followed by batch I - 2.97% and batch II - 2.73%. According to the requirements in force, the acidity of fresh goat cheese must not be higher than 40°T. The goat cheese from batch I falls within the requirements in force, while the goat cheese from batches II and III was obtained with a higher acidity than the requirements in force by 2.3°T, therefore it is more acidic. Comparing the data obtained with the requirements in force for goat cheese, we can mention that the water content of the cheese obtained by us was higher in all batches compared to the requirements in force (50%)