This is the chief reason why Canada's egg prices have remained sane while the US has exploded. It's not like we don't have bird flu here and we haven't had culls. We just have smaller flocks.
https://www.cbc.ca/news/canada/egg-prices-avian-flu-canada-u...
Still, backyard chickens are a hobby, for if you like chickens. It will always cost more than an egg farm.
Presumably the risk of spread of bird flu to humans increases though, due to the increased amount of contact. And then the increased risk of mutation leading to human to human transmission.
Bit wild to me that we don't seem to be taking this very seriously other than "o no my eggs" given we just had a pandemic a few years ago.