7 000 birds are reported to have been killed by the highly pathogenic H5N8 bird flu. The company had to cull 140 000 birds as a preventative measure to control the spread of the disease.
Sources.
1. "Avian influenza outbreak hits Irvines", The Herald, viewed 6 June 2017, http://www.herald.co.zw/avian-influenza-outbreak-hits-irvines/
2. "Zimbabwe reports H5N8 bird flue at poultry farm - OIE", CNBCAFRICA, viewed 3 June 2017, https://www.cnbcafrica.com/news/southern-africa/2017/06/02/zimbabwe-reports-h5n8-bird-flu-poultry-farm-oie/