Last year, I wrote a great deal about the rise of “ventilation shutdown plus” (VSD+), a method being used to mass kill poultry birds on factory farms by sealing off the airflow inside barns and pumping in extreme heat using industrial-scale heaters, so that the animals die of heatstroke over the course of hours. It is one of the worst forms of cruelty being inflicted on animals in the US food system — the equivalent of roasting animals to death — and it’s been used to kill tens of millions of poultry birds during the current avian flu outbreak.
As of this summer, the most recent period for which data is available, more than 49 million birds, or over 80 percent of the depopulated total, were killed in culls that used VSD+ either alone or in combination with other methods, according to an analysis of USDA data by Gwendolen Reyes-Illg, a veterinary adviser to the Animal Welfare Institute (AWI), an animal advocacy nonprofit. These mass killings, or “depopulations,” in the industry’s jargon, are paid for with public dollars through a USDA program that compensates livestock farmers for their losses.
There isn’t really a vaccine. One is being trialed but it is not available. The reason they are so extreme with this is that in affected birds they have about a 99% chance of dieing within 48 hours of infection. Waterfowl can carry it for longer but are still susceptible to death, they seem to be the major infection vector. HPAI highly contagious (highly pathonogenic avian influenza is the name), a bird brushing up on another is enough to spread it, due to birds cleaning their feathers with their mouths. So if a poultry farm tests positive they want to quarantine it ASAP so a sparrow doesn’t spread it to neighbors and wild populations.
Today I learned. Here’s hoping they have a vaccine soon.
And, setting up an entire culling operation, which would have to include transporting the birds, and contaminating another facility and several semi trailers, and staff, not to mention other wildlife is a huge risk. Shutting the windows and turning up the heat is probably the safest and quickest way to do things in this situation