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https://www.backyardchickencoops.com.au/blogs/learning-centre/isa-brown

I have several 3 year old ISAs that still lay. They live approximately 3 to 5 years but can make it to 8 with proper care. They are a hybrid cross of RIR rooster and a white hen such as a leghorn. It’s because they are bred to lay copious amounts off eggs that they can have lots of problems, but...