Once a year, Pakistanis mobilise for an operation that is akin to a major battle taking place in terms of scale and blood being spilled.Much is at stake – at least financially – as veritable four-legged armies numbering hundreds of thousands march on Pakistan’s population centres from farmsteads around the country.For the livestock farmers leading the sieges, the deals cut at pop-up markets for sacrificial bulls, goats and sheep – along with the occasional camel – on the Muslim festival of Eid...