But any sudden moves can also threaten to strangle businesses and scare away new investors, which Vietnam must avoid if it is to meet its revised 7% growth rate.
Previous research carried out by the same group has shown that hens also selectively avoid surroundings associated with high levels of standing and low levels of preening.
This does mean that you have to deal with the initial headaches associated with finding good help, but once you have a reliable system in place, you should avoid some of those more annoying tasks.
But compared with that group, the risk of dying from all causes was twice as great among the sun avoiders and 40% higher in those with moderate sun exposure.