The following link is updated regularly with information on the latest cases, including the restrictions that apply in the Disease Control Zones around the infected premises.
Some of these controls may include restricting access to outside flights. Currently, bird gatherings (Shows, sales etc.) are unaffected if the DOE requirements are complied with.
https://www.nfuonline.com/updates-and-information/avian-influenza-cases-confirmed-latest-news/