As WPI reported on 26 March (see here), HPAI was discovered as the “mystery illness” affecting dairy cows in Texas and Kansas, and then New Mexico, and yesterday Matt Herrington noted that the cases of HPAI have spread Michigan and Idaho. As USDA Animal and Plant Health Inspection Service (APHIS) noted in an alert, “this is a rapidly evolving situation.” This is the beginning of the wild bird migratory season, where birds interact with livestock, such as through water tanks, feed bunks, and nesting in barn rafters. However, non-migratory birds, including pigeons, blackbirds, and grackles were found dead on the dairy farms affected in Texas. Moreover, according to the Wisconsin Veterinary Diagnostic Laboratory, the M...