Brazil began a 28-day bird flu observation period on Thursday which it hopes will show the country's chicken farms are free of the disease after local authorities said a farm where its first outbreak was detected had been fully disinfected.

Metformin improves broiler breeder chickens’ metabolic health as they age say Penn State researchers
Animal disease unit of USDA has lost 16 per cent of staff
Farmers requested the workshop after a March bird flu response forum