Scientists have started work and one remedy suggested is a cull of the birds.
a cull cow
Calls have been made to cull the geese, who have grown rapidly in population in the last few years on Bedford's Embankment.
Feeding cull cows a feedlot diet for a period of time before selling may improve quality of animals and overall profitability.
We do not support the idea of wasting beef from perfectly healthy animals through an extraordinary cattle cull .
The development costs for all heifers were adjusted by the income from the sale of cull heifers.
Unfortunately their upkeep is so expensive - £468,000 a year - that the council is carrying out a cull .
At the time of marketing, cull cows were individually weighed, and BCS was recorded.
A total of 80 cull cows from four ranches were received at a commercial feedlot near Miles City, MI, in mid-November.
The hugely controversial contiguous cull of livestock to combat the foot-and-mouth epidemic was stoutly defended by the Government.