They are also able to discriminate between familiar individuals, and among humans. Cattle can tell the difference between familiar and unfamiliar animals of the same species (conspecifics). Studies show they behave less aggressively toward familiar individuals when they are forming a new group.  Calves can also discriminate between humans based on previous experience, as shown by approaching those who handled them positively and avoiding those who handled them aversively.  Although cattle can discriminate between humans by their faces alone, they also use other cues such as the color of clothes when these are available. 
11. Mandoor bhasma - It is prepared by purifying and calcinating iron rust. Since it is purified and used in mild dosage and mixed with other herbs, it is safe to have it. Acts as a powerful haematinic, diuretic and useful in treating diseases like anemia, amenorrhea, dysmenorrhea, menorrhagia, edema, intestinal worms, dyspepsia, chronic bowel movements and jaundice. It is most useful in liver diseases and also in kidney disease and enlargement of spleen. It not only removes toxins from the blood but also help to reduce edema, swelling around joint, fluid accumulation in the feet, heart and other parts of the body.