Hi Dileep,
I thought referring to George B. Schaller as he had done a good study on Bharals.

1. Name: He preferred the name Bharal to Blue Sheep. In 1833 Brian Hodgson a naturalist first gave it a scientific name Ovis nayaur under the assumption that bharal is a sheep. Then in 1846 he placed the bharal in a separate genus, Pseudois. So the name Pseudois nayaur stands till date. The stout horns of the Bharal resembles that of a sheep. However, its broad flat tail, black and white markings on forelegs it is goat like. "Sheep have eye glands and they have pedal glands between their hooves, whereas goats lack eye glands and are equipped with pedal glands only on the forefeet, if at all. blue sheep add to the confusion in that some individuals have rudimentary eye and pedal glands and others lack them".

2. Horns: "Only fully adult males have intensely black and swollen necks. However, their most important status symbol is horn length. Growing throughout the life of an animal, horns reflect the age and, by implication, the strength of the bearer. On meeting each other, two males can usually evaluate each other's fighting potential at a glance, and the smaller animal then defers to the larger".

and Schaller goes on to describe many interesting facets of Bharal and finally concludes:

".... The evidence indicates that bharal are basically goats. Some of their sheeplike traits can be ascribed to convergent evolution, the species having settled in a habitat usually occupied by sheep. This is more than merely a situation of behaviour modified by change. Bharal remain rather generalized. Their horns are fairly short bashing instruments, not quite like those of either sheep or goats. In their glandular structure, in their use of the penis, and in other traits, bharal show an evolutionary hesitation to specialize - they have straddled an evolutionary fence. They could become either sheep or goats with only minor alterations, and if I had to design a hypothetical ancestor of these two forms it would look much like a bharal. Bharal probably split from goat stock shortly after the sheep and goats diverged from their common ancestor to develop along separate evolutionary paths".

He had also mentioned one incident like yours. He had observed this in a place in Nepal.
"Six bharal were grazing on a slope when suddenly two wolves - large, silvery-gray beasts-bounded downhill toward them, the speed of their attack hampered by the procumbent junipers over which they had to leap. Bunching up, the bharal raced to a cliff below. The wolves almost succeeded in overtaking a lagging female, but she angled sharply downhill, barely escaping onto a precipice. The foiled wolves returned up the slope, where they rejoined two others who had not participated in the chase. Six hours later the bharal still lingered near the safety of their cliff".

The altitude you had mentioned, will attract the snow leopard in the winters. So the cause of the alarm might be because of wolf/wolves or even a leopard. The Himalayan Black bear always ready to appropriate a kill, however, in this case I would rule out a bear.

Cheers,
Sabyasachi