We've also had bird flu in NL some years ago, but I don't think it was anywhere near that dramatic. I do vaguely recall that it was mostly an issue for free range chickens, because they go outside and can get infected by wild birds shitting from above. I'd expect indoor chickens to be less vulnerable, though I do recall similar measures to prevent humans from spreading it. I think there have been rules that free range chickens need to get a roof over their heads to prevent spreading.
It's still weird that it got so dramatically out of hand in the US this time.
One thing someone else posted is that poultry farms are 1000 to 10000 times bigger in just number of poultry per facility in the USA, some news report speculation this issue is going to force USA poultry farms to vaccinate - this is already done in Mexico and much of EU including NL, but vaccination has been politicized in the USA and it would cut into profits sans bird flu and corporations run the show here. We know vaccination works because the countries that adapted it stopped it from infecting their farm stock.
The Trump administration has stated that the CDC and other public health organizations cannot release any data or statements without first running them through the organization. So these public health orgs and the general public have not been communicating like they should during such a disaster. It’s insane and because of this we’re only at the tip of the bird flu iceberg.
It's still weird that it got so dramatically out of hand in the US this time.